7/30/2019 Air Systems R 01
1/120
Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 1 of 120
737-300/400
AIR SYSTEMS
NextMain Menu Quit
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
2/120
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
3/120
Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 3 of 120
737-300/400 Pneumatic Schematic
No. 1 engine
The No. 1 engine supplies
either 5th or 9th stage bleed air
to the pneumatic manifold.
Bleed air from the 5th stage is
normally utilized, while 9th
stage bleed air is utilized when
the engine rpm is low.
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
4/120
Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 4 of 120
737-300/400 Pneumatic Schematic
The engine anti-ice plumbing is
prior to the engine bleed valve.
Therefore, engine anti-ice is
available regardless of the
position of the bleed valve
(open or closed).
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
5/120
Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 5 of 120
737-300/400 Pneumatic Schematic
The left BLEED TRIP OFF light
illuminates whenever the No. 1
engine pressure or temperature
exceeds a predetermined limit,
which in turn will automatically
close the bleed valve.
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
6/120
Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 6 of 120
737-300/400 Pneumatic Schematic
The pre-cooler temp sensor
measures the temperature of
the bleed air. If needed, it will
send an electrical signal to
open the pre-cooler valve
which then allows fan air to
cool the bleed air.
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
7/120Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 7 of 120
737-300/400 Pneumatic Schematic
Bleed air is required to start an
engine. This air may originate
from the APU, a ground source,
or the other engine.
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
8/120Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 8 of 120
737-300/400 Pneumatic Schematic
Bleed air from the No. 1 engine
is normally utilized for left wing
anti-ice. If bleed air from the
No. 1 engine is not available,
bleed air from the No. 2 engine
may be utilized if the isolation
valve is open.
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
To left wing
anti-ice
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
9/120Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 9 of 120
737-300/400 Pneumatic Schematic
Pneumatic pressure for both
A and B hydraulic
reservoirs may be taken from
the left side of the pneumatic
manifold.
To hydraulicreservoir
(A & B)
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
To starter
Start valve
PLeft duct
pressure Isolation valve
To left wing
anti-ice
T
Pre-cooler
temp sensor
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
10/120Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 10 of 120
737-300/400 Pneumatic Schematic
APU bleed air enters the
pneumatic manifold on the left
side of the isolation valve.
APU
bleed
valve
APU
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
To hydraulicreservoir
(A & B)
To left wing
anti-ice
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
11/120Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 11 of 120
737-300/400 Pneumatic Schematic
Bleed air to the left Pressure
and Air Conditioning Kit
(PACK) normally originates
from the No. 1 engine. If the
No. 1 engine bleed air is not
available, APU bleed air may be
utilized.
Left PACK
Left
PACK
valve
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
To hydraulicreservoir
(A & B)
To left wing
anti-ice
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
12/120Previous NextStart OverPT. METRO BATAVIA
Directorate of OperationalVersion 1.0Main Menu Quit Slide 12 of 120
737-300/400 Pneumatic Schematic
The air cycle machine (inside the PACK
bay) consists of a compressor and a
turbine. Its function is to assist in
cooling the bleed air. A temperature
sensor measures bleed air exiting the
compressor and a temperature sensor
measures bleed air entering the turbine.
Either one of these sensors will illuminate
the PACK TRIP OFF light if the
predetermined temperature is exceeded.
Left PACK
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
To hydraulicreservoir
(A & B)
To left wing
anti-ice
T T
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
13/120Previous NextStart OverPT. METRO BATAVIA
Directorate of OperationalVersion 1.0Main Menu Quit Slide 13 of 120
737-300/400 Pneumatic Schematic
Ram air is also utilized to cool
the bleed air. This is done via
two heat exchangers located in
the PACK bay. When
necessary, the turbofan helps
draw ram air into the system.
Deflector door
Ram air inlet
Ram air inlet door
Ram air
exhaust louvers
Turbofan
Left PACK
T T
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
To hydraulicreservoir
(A & B)
To left wing
anti-ice
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
14/120Previous NextStart OverPT. METRO BATAVIA
Directorate of OperationalVersion 1.0Main Menu Quit Slide 14 of 120
737-300/400 Pneumatic Schematic
The turbofan operates utilizing
bleed air.
Turbofan
valve
Deflector door
Ram air inlet
Ram air inlet door
Ram air
exhaust louvers
Turbofan
Left PACK
T T
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
To hydraulicreservoir
(A & B)
To left wing
anti-ice
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
15/120Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 15 of 120
737-300/400 Pneumatic Schematic
As the conditioned air exits the
left PACK, it then enters the air
mix manifold where it
combines with conditioned air
from the right PACK. The air
then travels into the cabin via
the left and right sidewall
risers.
Air Mix Manifold
To cabin
(left sidewall riser)
TSupplyduct temp
To cabin
(right sidewall riser)
Turbofan
valve
Deflector door
Ram air inlet
Ram air inlet door
Ram air
exhaust louvers
Turbofan
Left PACK
T T
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
To hydraulicreservoir
(A & B)
To left wing
anti-ice
ColdHot
Water
separator
Air mix
valves
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
16/120Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 16 of 120
737-300/400 Pneumatic Schematic
Some of the conditioned air
from the left PACK is routed to
the flight deck. In this
plumbing there are two
temperature sensors: one for
the PACK TRIP OFF light and
one for the
DUCT OVERHEAT light.
Riser to flight
deck
T
T
Air Mix Manifold
To cabin
(left sidewall riser)
TSupplyduct temp
To cabin
(right sidewall riser)
Turbofan
valve
Deflector door
Ram air inlet
Ram air inlet door
Ram air
exhaust louvers
Turbofan
Left PACK
T T
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
ColdHot
Water
separator
Air mix
valves
To hydraulicreservoir
(A & B)
To left wing
anti-ice
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
17/120Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 17 of 120
737-300/400 Pneumatic Schematic
The recirculation fan (RECIRCFAN) draws air from a shroud
above the forward cargo
compartment and directs it
back into the air mix manifold.
From there it is recirculated
back into the cabin
From shroud above
forward cargo
compartment
Recirc
fan
Riser to flight
deck
T
T
Air Mix Manifold
To cabin
(left sidewall riser)
TSupplyduct temp
To cabin
(right sidewall riser)
Turbofan
valve
Deflector door
Ram air inlet
Ram air inlet door
Ram air
exhaust louvers
Turbofan
Left PACK
T T
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
ColdHot
Water
separator
Air mix
valves
To hydraulicreservoir
(A & B)
To left wing
anti-ice
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
18/120Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 18 of 120
737-300/400 Pneumatic Schematic
The ground air conditioninghose is connected directly to
the air mix manifold, where it is
then routed to the cabin via the
sidewall risers. Air from this
hose is not processed by either
PACK.
Ground air conditioning
Riser to flight
deck
T
T
Air Mix Manifold
To cabin
(left sidewall riser)
TSupplyduct temp
To cabin
(right sidewall riser)
Turbofan
valve
Deflector door
Ram air inlet
Ram air inlet door
Ram air
exhaust louvers
Turbofan
Left PACK
T T
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
ColdHot
Water
separator
Air mix
valves
To hydraulicreservoir
(A & B)
From shroud above
forward cargo
compartment
Recirc
fan
To left wing
anti-ice
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
19/120Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 19 of 120
737-300/400 Pneumatic Schematic
The potable water tank has acapacity of approximately 20
U.S. gallons and is pressurized
from the left side of the
pneumatic manifold.
Towatertank
Riser to flight
deck
T
T
Air Mix Manifold
To cabin
(left sidewall riser)
TSupplyduct temp
To cabin
(right sidewall riser)
Turbofan
valve
Deflector door
Ram air inlet
Ram air inlet door
Ram air
exhaust louvers
Turbofan
Left PACK
T T
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
ColdHot
Water
separator
Air mix
valves
To hydraulicreservoir
(A & B)
From shroud above
forward cargo
compartment
Recirc
fan
Ground air conditioning
To left wing
anti-ice
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 20 of 120
737-300/400 Pneumatic Schematic
The No. 2 engine supplieseither 5th or 9th stage bleed air
to the pneumatic manifold.
Bleed air from the 5th stage is
normally utilized, while 9th
stage bleed air is utilized when
the engine rpm is low.
No. 2 engine
5th stage air
Bleed
valve
9th stage
air
9th stage
modulating
and shutoff
valve
Riser to flight
deck
T
T
Air Mix Manifold
To cabin
(left sidewall riser)
TSupplyduct temp
To cabin
(right sidewall riser)
Turbofan
valve
Deflector door
Ram air inlet
Ram air inlet door
Ram air
exhaust louvers
Turbofan
Left PACK
T T
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
ColdHot
Water
separator
Air mix
valves
To hydraulicreservoir
(A & B)
From shroud above
forward cargo
compartment
Recirc
fan
Ground air conditioning
To left wing
anti-ice
Towatertank
3 300/400 P i S h i
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 21 of 120
737-300/400 Pneumatic Schematic
The engine anti-ice plumbing isprior to the engine bleed valve.
Therefore, engine anti-ice is
available regardless of the
position of the bleed valve
(open or closed).
Riser to flight
deck
T
T
Air Mix Manifold
To cabin
(left sidewall riser)
TSupplyduct temp
To cabin
(right sidewall riser)
Turbofan
valve
Deflector door
Ram air inlet
Ram air inlet door
Ram air
exhaust louvers
Turbofan
Left PACK
T T
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
ColdHot
Water
separator
Air mix
valves
To hydraulicreservoir
(A & B)
From shroud above
forward cargo
compartment
Recirc
fan
Ground air conditioning
No. 2 engine
5th stage air
Bleed
valve
9th stage
air
9th stage
modulating
and shutoff
valve
Towatertank
To left wing
anti-ice
To cowl
anti-ice
737 300/400 P ti S h ti
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 22 of 120
737-300/400 Pneumatic Schematic
The right BLEED TRIP OFFlight illuminates whenever the
No. 2 engine pressure or
temperature exceeds a
predetermined limit, which in
turn will automatically close
the bleed valve.
Riser to flight
deck
T
T
Air Mix Manifold
To cabin
(left sidewall riser)
TSupplyduct temp
To cabin
(right sidewall riser)
Turbofan
valve
Deflector door
Ram air inlet
Ram air inlet door
Ram air
exhaust louvers
Turbofan
Left PACK
T T
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
ColdHot
Water
separator
Air mix
valves
To hydraulicreservoir
(A & B)
From shroud above
forward cargo
compartment
Recirc
fan
Ground air conditioning
No. 2 engine
5th stage air
Bleed
valve
9th stage
air
9th stage
modulating
and shutoff
valve
To cowl
anti-ice
Towatertank
To left wing
anti-ice
T P
737 300/400 P ti S h ti
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 23 of 120
737-300/400 Pneumatic Schematic
Riser to flight
deck
T
T
Air Mix Manifold
To cabin
(left sidewall riser)
TSupplyduct temp
To cabin
(right sidewall riser)
Turbofan
valve
Deflector door
Ram air inlet
Ram air inlet door
Ram air
exhaust louvers
Turbofan
Left PACK
T T
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
ColdHot
Water
separator
Air mix
valves
To hydraulicreservoir
(A & B)
From shroud above
forward cargo
compartment
Recirc
fan
Ground air conditioning
No. 2 engine
5th stage air
Bleed
valve
9th stage
air
9th stage
modulating
and shutoff
valve
To cowl
anti-ice
T PTo
watertank
To left wing
anti-ice
The pre-cooler temp sensormeasures the temperature of
the bleed air. If needed, it will
send an electrical signal to
open the pre-cooler valve
which then allows fan air to
cool the bleed air.
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
737 300/400 P ti S h ti
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 24 of 120
737-300/400 Pneumatic Schematic
Bleed air is required to start anengine. This air may originate
from the APU, a ground source,
or the other engine.
Riser to flight
deck
T
T
Air Mix Manifold
To cabin
(left sidewall riser)
TSupplyduct temp
To cabin
(right sidewall riser)
Turbofan
valve
Deflector door
Ram air inlet
Ram air inlet door
Ram air
exhaust louvers
Turbofan
Left PACK
T T
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
ColdHot
Water
separator
Air mix
valves
To hydraulicreservoir
(A & B)
From shroud above
forward cargo
compartment
Recirc
fan
Ground air conditioning
No. 2 engine
5th stage air
Bleed
valve
9th stage
air
9th stage
modulating
and shutoff
valve
To cowl
anti-ice
T P
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
Towatertank
To left wing
anti-ice
To starter
Start valve
737 300/400 P ti S h ti
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 25 of 120
737-300/400 Pneumatic Schematic
Bleed air from the No. 2 engineis normally utilized for right
wing anti-ice. If bleed air from
the No. 2 engine is not
available, bleed air from the No.
1 engine may be utilized if the
isolation valve is open.
P
Right duct
pressure
To right wing
anti-ice
Riser to flight
deck
T
T
Air Mix Manifold
To cabin
(left sidewall riser)
TSupplyduct temp
To cabin
(right sidewall riser)
Turbofan
valve
Deflector door
Ram air inlet
Ram air inlet door
Ram air
exhaust louvers
Turbofan
Left PACK
T T
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
ColdHot
Water
separator
Air mix
valves
To hydraulicreservoir
(A & B)
From shroud above
forward cargo
compartment
Recirc
fan
Ground air conditioning
No. 2 engine
5th stage air
Bleed
valve
9th stage
air
9th stage
modulating
and shutoff
valve
To cowl
anti-ice
T P
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
Towatertank
To left wing
anti-ice
737 300/400 P ti S h ti
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 26 of 120
737-300/400 Pneumatic Schematic
Pneumatic pressure for bothA and B hydraulic
reservoirs may be taken from
the right side of the pneumatic
manifold.
To hydraulicreservoir
(A & B)
P
Right duct
pressure
Riser to flight
deck
T
T
Air Mix Manifold
To cabin
(left sidewall riser)
TSupplyduct temp
To cabin
(right sidewall riser)
Turbofan
valve
Deflector door
Ram air inlet
Ram air inlet door
Ram air
exhaust louvers
Turbofan
Left PACK
T T
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
ColdHot
Water
separator
Air mix
valves
To hydraulicreservoir
(A & B)
From shroud above
forward cargo
compartment
Recirc
fan
Ground air conditioning
No. 2 engine
5th stage air
Bleed
valve
9th stage
air
9th stage
modulating
and shutoff
valve
To cowl
anti-ice
T P
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
Towatertank
To left wing
anti-iceTo right wing
anti-ice
737 300/400 Pneumatic Schematic
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 27 of 120
737-300/400 Pneumatic Schematic
Bleed air to the right PACKnormally originates from the
No. 2 engine. If the No. 2
engine bleed air is not
available, APU bleed air may be
utilized if the isolation valve is
open.
Right PACK
Right
PACK
valve
P
Right duct
pressure
Riser to flight
deck
T
T
Air Mix Manifold
To cabin
(left sidewall riser)
TSupplyduct temp
To cabin
(right sidewall riser)
Turbofan
valve
Deflector door
Ram air inlet
Ram air inlet door
Ram air
exhaust louvers
Turbofan
Left PACK
T T
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
ColdHot
Water
separator
Air mix
valves
To hydraulicreservoir
(A & B)
From shroud above
forward cargo
compartment
Recirc
fan
Ground air conditioning
No. 2 engine
5th stage air
Bleed
valve
9th stage
air
9th stage
modulating
and shutoff
valve
To cowl
anti-ice
T P
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
To hydraulicreservoir
(A & B)
Towatertank
To left wing
anti-iceTo right wing
anti-ice
737 300/400 Pneumatic Schematic
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 28 of 120
737-300/400 Pneumatic Schematic
The air cycle machine (inside thePACK bay) consists of a compressor
and a turbine. Its function is to assist
in cooling the bleed air. A temperature
sensor measures bleed air exiting the
compressor and a temperature sensor
measures bleed air entering the
turbine. Either one of these sensors
will illuminate the PACK TRIP OFF
light if the predetermined temperature
is exceeded.
P
Right duct
pressure
Riser to flight
deck
T
T
Air Mix Manifold
To cabin
(left sidewall riser)
TSupplyduct temp
To cabin
(right sidewall riser)
Turbofan
valve
Deflector door
Ram air inlet
Ram air inlet door
Ram air
exhaust louvers
Turbofan
Left PACK
T T
No. 1 engine
5th stage air
Bleed
valve
9th stage
modulating
and shutoff
valve
9th stage
air
To cowl
anti-ice
P T
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
PLeft duct
pressure Isolation valve
APU
bleed
valve
APU
Left
PACK
valve
ColdHot
Water
separator
Air mix
valves
To hydraulicreservoir
(A & B)
From shroud above
forward cargo
compartment
Recirc
fan
Ground air conditioning
No. 2 engine
5th stage air
Bleed
valve
9th stage
air
9th stage
modulating
and shutoff
valve
To cowl
anti-ice
T P
Overboard
Pre-cooler
Pre-cooler
(fan air)
T
Pre-cooler
temp sensor
To starter
Start valve
To hydraulicreservoir
(A & B)
Right PACK
Right
PACK
valve
Towatertank
To left wing
anti-iceTo right wing
anti-ice
T T
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 34 of 120
Bleed Air/400 and Air Conditioning
Controls and Indicators
Forward Overhead Panel
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 35 of 120
Bleed Air and Air Conditioning
Controls and IndicatorsDUAL BLEED Light:
Illuminated
Indicates that the potential of back-pressuring the
APU exists.
The following scenarios will result in illumination
of the DUAL BLEED light:
No. 1 engine bleed air switch ON and APU bleed
air valve open.
No. 2 engine bleed air switch ON, APU bleed air
valve open, and isolation valve open.
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 36 of 120
Bleed Air and Air Conditioning
Controls and IndicatorsRAM DOOR FULL OPEN lights:
Illuminated
Respective ram air inlet door is in the full-open
position.
See picture of
left ram air inlet door
See picture of
right ram air inlet door
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Bleed Air and Air Conditioning
Controls and IndicatorsRECIRC FAN Switch:
AUTO
The recirculation fan is signaled to operate. The
recirculation fan will not operate if both PACKs
are operating and either PACK switch is
positioned to HIGH.
OFF
The recirculation fan is signaled OFF.
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Bleed Air and Air Conditioning
Controls and IndicatorsBleed Air Duct Pressure Indicator:
Indicates the pressure (psi) in the left and right
pneumatic manifold.
Two needles, L and R.
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Bleed Air and Air Conditioning
Controls and IndicatorsWing-Body OVHT TEST Switch:
Push
Tests the circuits for the wing-body overheat
system.
Illuminates both WING-BODY OVERHEAT lights.
Test may take up to five seconds to complete.
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Bleed Air and Air Conditioning
Controls and IndicatorsAir Conditioning PACK Switches (Left and Right):
OFF
Respective PACK signaled OFF (PACK valve closes).
AUTO
With both PACKs operating, each PACK regulates
to the low flow mode (55 pounds/min.).
With only one PACK operating (in flight with
trailing edge flaps up), the operating PACK
regulates to the high flow mode (80 pounds/min.).
When only one PACK is operating and utilizing
the APU as the bleed air source (both engine bleed
air switches OFF), the operating PACK regulates to
the high flow mode (80 pounds/min.).
HIGH
Respective PACK regulates to the high flow mode
(80 pounds/min.).
While on the ground and operating one PACK with
APU bleed air, the operating PACK regulates to the
APU high air flow mode (100 pounds/min.).
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Bleed Air and Air Conditioning
Controls and IndicatorsISOLATION VALVE Switch:
CLOSE
Closes isolation valve.
AUTO
Isolation valve will close if both BLEED switches
are positioned to ON and both PACK switches are
positioned to either AUTO or HIGH.
Isolation valve will automatically open if any one of
the four corner switches (BLEED or PACK) are
positioned to OFF.
OPEN
Opens isolation valve.
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Bleed Air and Air Conditioning
Controls and IndicatorsEngine BLEED Air Switches (labeled 1 and 2):
OFF
Closes respective engine bleed air valve.
ON
Opens respective engine bleed air valve when
related engine is operating.
Note: The engine bleed air valves are electrically
activated and pneumatically operated, therefore
bleed air from the respective engine is required for
the valve to remain open.
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Bleed Air and Air Conditioning
Controls and IndicatorsAPU BLEED Air Switch:
OFF
Closes APU bleed air valve.
ON
Opens APU bleed air valve when APU is operating.
Note: The APU bleed air valve is electrically
activated and pneumatically operated, therefore
bleed air from the APU is required for the valve to
remain open.
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Bleed Air and Air Conditioning
Controls and IndicatorsPACK TRIP OFF Lights:
Illuminated
Respective PACK temperature or respective supply
duct has exceeded limits.
Respective PACK valve automatically closes and
air mix valves drive to the full-cold position.
Note: To reset (extinguish) the PACK TRIP OFF light
and regain control of the PACK valve, the TRIP
RESET switch must be pushed.
Note: The full-cold position of the air mix valves is
defined as the cold air mix valve being full-open and
the hot air mix valve being full-closed.
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Bleed Air and Air Conditioning
Controls and IndicatorsWING-BODY OVERHEAT Lights:
Illuminated
Left light indicates a bleed air duct leak in the left
pneumatic manifold.
Right light indicates a bleed air duct leak in the
right pneumatic manifold.
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Bleed Air and Air ConditioningControls and Indicators
BLEED TRIP OFF Lights:
Illuminated
Excessive bleed air temperature or pressure from
respective engine.
Respective engine bleed air valve automatically
closes.
Note: To reset (extinguish) the BLEED TRIP OFF light
and regain control of the bleed valve, the TRIP
RESET switch must be pushed.
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Bleed Air and Air ConditioningControls and Indicators
TRIP RESET Switch:
Push
Will reset (extinguish) PACK TRIP OFF, BLEED TRIP
OFF and DUCT OVERHEAT lights, if condition that
initiated the fault has been corrected.
Note: Lights remain illuminated until reset.
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Bleed Air and Air ConditioningControls and Indicators
Forward Overhead Panel
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Bleed Air and Air ConditioningControls and Indicators
AIR TEMP Source Selector:
SUPPLY DUCT
Selects the main distribution supply duct sensor.
Air temperature at the sensor is then displayed on
the air temperature indicator.
Note: This sensor is located in the flight deck aft ofthe aft overhead panel.
PASS CABIN
Selects passenger cabin sensor. Air temperature at
the sensor is then displayed on the air temperature
indicator.
Note: This sensor is located in the forward half of
the passenger cabin, aircraft right, on the underside
of one of the overhead stowage compartments.
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Bleed Air and Air ConditioningControls and Indicators
AIR MIX VALVE Indicators:
Indicates position of the air mix valves (left
indicator is for the left PACK air mix valves; right
indicator is for the right PACK air mix valves).
Controlled automatically when the respective
temperature selector is in AUTO.
Controlled manually when the respectivetemperature selector positioned to MANUAL.
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Bleed Air and Air ConditioningControls and Indicators
TEMP (Air Temperature) Indicator:
Indicates temperature at location selected by the
AIR TEMP source selector.
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Bleed Air and Air ConditioningControls and Indicators
DUCT OVERHEAT Lights:
Illuminated
Bleed air in respective duct exceeds limits (left
DUCT OVERHEAT sensor located in the supply
duct leading to the flight deck; right DUCT
OVERHEAT sensor located in the right sidewall
riser leading to the passenger cabin). Respective PACK air mix valves drive to the
full-cold position.
Note: To reset (extinguish) the DUCT OVERHEAT
light and regain control of the air mix valves, the
TRIP RESET switch must be pushed.
Note: The full-cold position of the air mix valves is
defined as the cold air mix valve being full-open and
the hot air mix valve being full-closed.
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Bleed Air and Air ConditioningControls and Indicators
CONT CABIN & PASS CABIN Temperature Selectors:
Two modes (AUTO & MANUAL)
AUTO
Left temperature selector allows an automatic
temperature controller to control the temperature of
the control cabin (flight deck). Right temperature
selector allows an automatic temperature controller tocontrol the temperature of the passenger cabin.
MANUAL
The automatic temperature controller is bypassed and
the air mix valves are now manually controlled.
This concludes the review of the Bleed Air/Air Conditioning Controls and Indicators.
The next section will discuss the Cabin Pressurization Panel and various other panels.
Click Nextto continue.
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Cabin Pressurization PanelControls and Indicators
Forward Overhead Panel
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Cabin Pressurization PanelControls and Indicators
AUTO FAIL Light:
Illuminated
Automatic pressurization control failure due to any
one of the following three conditions:
Loss of AC power for more than 15 seconds
Excessive rate of cabin pressure change
(+/- 1800 feet/min.) Cabin altitude in excess of 13,875 feet
Control of pressurization automatically transfers to
STANDBY mode.
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Cabin Pressurization PanelControls and Indicators
OFF SCHED DESCENT Light:
Illuminated
Aircraft descends before reaching within 0.25 psi of
the altitude which has been set in the FLT ALT
indicator.
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Cabin Pressurization PanelControls and Indicators
STANDBY Light:
Illuminated
Pressurization system operating in the STANDBY
mode.
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Cabin Pressurization PanelControls and Indicators
MANUAL Light:
Illuminated
Pressurization system operating in the MANUAL
mode.
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Cabin Pressurization PanelControls and Indicators
FLT ALT Indicator:
Indicates selected cruise altitude.
Selected cruise altitude is set prior to takeoff.
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Cabin Pressurization PanelControls and Indicators
FLT ALT Selector:
Push and rotate to set planned cruise altitude in
FLT ALT indicator.
Note: If the flight altitude selector is depressed
during the climb when operating in the AUTO mode,
the automatic abort capability to the takeoff fieldelevation will be lost.
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Cabin Pressurization PanelControls and Indicators
LAND ALT Indicator:
Indicates field elevation of the airport of intended
landing.
Field elevation of the airport of intended landing is
set prior to takeoff.
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 62 of 120
Cabin Pressurization PanelControls and Indicators
LAND ALT Selector:
Rotate to set field elevation of airport of intended
landing in LAND ALT indicator.
Large diameter control sets 1000 foot increments.
Small diameter control sets 10 foot increments.
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Cabin Pressurization PanelControls and Indicators
CABIN RATE Selector:
DECR
Cabin altitude rate of change equals 50 feet/min.
Index
Cabin altitude rate of change equals 300 feet/min.
INCR
Cabin altitude rate of change equals 2000 feet/min.
Note: Operates only with the pressurization mode
selector in STBY.
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 64 of 120
Cabin Pressurization PanelControls and Indicators
CAB ALT Indicator:
Indicates selected cabin altitude.
Utilized when operating in the STANDBY mode.
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 65 of 120
Cabin Pressurization PanelControls and Indicators
CAB ALT Selector:
Rotate to select desired cabin altitude.
Large diameter control sets 1000 foot increments.
Small diameter control sets 10 foot increments.
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 66 of 120
Cabin Pressurization PanelControls and Indicators
Main outflow VALVE Position Indicator:
Indicates position of main outflow valve.
Operates in all three modes (AUTO, STANDBY, and
MANUAL).
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 67 of 120
Cabin Pressurization PanelControls and Indicators
Main Outflow Valve Switch:
(spring-loaded to center)
CLOSE
Closes main outflow valve electrically when the
pressurization mode selector is in the MAN AC or
MAN DC position.
OPEN
Opens main outflow valve electrically when the
pressurization mode selector is in the MAN AC or
MAN DC position.
http://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.ppshttp://localhost/var/www/apps/conversion/tmp/Cactus%20Aviation%20Services%20LLC%20Contact%20Information.pps7/30/2019 Air Systems R 01
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 68 of 120
Cabin Pressurization PanelControls and Indicators
FLT/GRD Switch:
AUTO Mode
GRD
On the ground, drives the main outflow valve to the full-
open position at a controlled rate and depressurizes the
aircraft. After takeoff, switch is inhibited; function is the
same as FLT position.
FLTOn the ground, pressurizes cabin to approximately 200 feet
below takeoff field elevation. After takeoff, cabin pressure is
automatically controlled in both the climb and decent phase
as a function of airplane altitude. In the cruise phase, cabin
pressure is held constant.
STANDBY Mode
GRD
On the ground, drives the main outflow valve open at the
rate selected by the cabin rate selector. After takeoff, switch
is inhibited; function is the same as FLT position.
FLT
Pressurizes the aircraft to the cabin altitude selected in the
cabin altitude indicator at the rate selected by the cabin rate
selector.
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Previous NextStart OverPT. METRO BATAVIADirectorate of Operational Version 1.0Main Menu Quit Slide 69 of 120
Cabin Pressurization PanelControls and Indicators
Pressurization Mode Selector:
AUTO
Pressurization system is controlled automatically.
STBY
Pressurization system is controlled utilizing the
STANDBY mode.
MAN AC
Pressurization system is controlled manually by the
main outflow valve switch. Main outflow valve
operates utilizing AC power. All auto and standby
circuits are bypassed.
MAN DCPressurization system is controlled manually by the
main outflow valve switch. Main outflow valve
operates utilizing DC power. All auto and standby
circuits are bypassed.
CHECK
Tests auto failure function of the AUTO system.
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