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Slide 1 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
737-300/400737-300/400ANTI-ICEANTI-ICE
NextNextMain MenuMain Menu QuitQuit
Slide 2 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Anti-Ice Protection Areas
The cowl lip on both engines are heated utilizing bleed air.
Both elevator pitot tubes (one on each
side of vertical stabilizer) are
electrically heated.
All six leading edge slats (three on each wing) are
heated utilizing bleed air.
All four pitot-static tubes (two on
each side), both AOA vanes (one
on each side) and the TAT probe (left
side only) are electrically heated.
Eight of the ten flight deck windows are electrically heated.
Slide 3 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Window Heat PanelWindow Heat Panel
Slide 4 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Window Heat PanelWindow Heat Panel
Window OVERHEAT Lights:Window OVERHEAT Lights:Illuminated –Illuminated –Overheat condition is detected.Overheat condition is detected.Temp reaches 62 degree celciusTemp reaches 62 degree celcius
Note: OVERHEAT light illuminates Note: OVERHEAT light illuminates if electrical power to window is if electrical power to window is interrupted.interrupted.
Slide 5 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Window Heat PanelWindow Heat Panel
Window Heat ON Lights:Window Heat ON Lights:Illuminated –Illuminated –Window heat is being applied to Window heat is being applied to selected window. Under normal selected window. Under normal conditions, all four green ON lights conditions, all four green ON lights should illuminate when the WINDOW should illuminate when the WINDOW HEAT switches are positioned to ON.HEAT switches are positioned to ON. Range working temperature 32-43 degree Range working temperature 32-43 degree celciuscelcius
Extinguished –Extinguished –One of the following has occurred:One of the following has occurred:• The respective switch has been The respective switch has been
turned OFF.turned OFF.• An overheat condition has been An overheat condition has been
detected.detected.• A system failure has occurred.A system failure has occurred.• The respective window is already The respective window is already
above it normal operating temperature.above it normal operating temperature.
Slide 6 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Window Heat PanelWindow Heat Panel
WINDOW HEAT Switches:WINDOW HEAT Switches:ON –ON –Window heat is applied to selected Window heat is applied to selected window.window.
OFF –OFF –Window heat not in use.Window heat not in use.
Slide 7 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Window Heat PanelWindow Heat Panel
WINDOW HEAT Test Switch:WINDOW HEAT Test Switch:(spring-loaded to center)(spring-loaded to center)OVHT –OVHT –Tests the window overheat system by Tests the window overheat system by simulatingsimulating an OVERHEAT condition. an OVERHEAT condition.
PWR TEST –PWR TEST –Provides a confidence test. Use PWR Provides a confidence test. Use PWR TEST whenever one or more green ON TEST whenever one or more green ON lights lights do notdo not illuminate when the illuminate when the WINDOW HEAT switches are positioned WINDOW HEAT switches are positioned to ON. to ON.
Slide 8 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Window/Foot Air ControlsWindow/Foot Air Controls
WINDSHIELD AIR Controls:WINDSHIELD AIR Controls:Pull –Pull –Supplies conditioned air to respective Supplies conditioned air to respective forward windows (L1 and R1) for forward windows (L1 and R1) for defogging.defogging.
FOOT AIR Controls:FOOT AIR Controls:Pull –Pull –Supplies conditioned air to pilots’ leg Supplies conditioned air to pilots’ leg positions.positions.
Slide 9 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Pitot-Static Heat PanelPitot-Static Heat Panel
Slide 10 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Pitot-Static Heat PanelPitot-Static Heat Panel
PITOT STATIC Lights:PITOT STATIC Lights:Illuminated –Illuminated –Related probe not heated.Related probe not heated.
Extinguished –Extinguished –Related probe is receiving heat.Related probe is receiving heat.
Slide 11 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Pitot-Static Heat PanelPitot-Static Heat Panel
PITOT STATIC HEAT Switches (A and PITOT STATIC HEAT Switches (A and B):B):ON –ON –Power is supplied to electrically heat Power is supplied to electrically heat related probe. Respective pitot-static related probe. Respective pitot-static light will extinguish to indicate heat is light will extinguish to indicate heat is being applied.being applied.
OFF –OFF –Power is removed from related probe.Power is removed from related probe.
Slide 12 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Engine Anti-Ice PanelEngine Anti-Ice Panel
Slide 13 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Engine Anti-Ice PanelEngine Anti-Ice PanelCOWL ANTI-ICE Lights:COWL ANTI-ICE Lights:Illuminated –Illuminated –Indicates an overpressure or Indicates an overpressure or overtemperature condition in the duct overtemperature condition in the duct downstream of the engine cowl anti-downstream of the engine cowl anti-ice valve.ice valve.Over pressure >65 PSIOver pressure >65 PSIOver temperature >825 degree F Over temperature >825 degree F
Slide 14 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Engine Anti-Ice PanelEngine Anti-Ice PanelCOWL VALVE OPEN Lights:COWL VALVE OPEN Lights:Illuminated Illuminated brightbright blue – blue –Related engine cowl anti-ice valve is in Related engine cowl anti-ice valve is in transit, or related engine cowl anti-ice transit, or related engine cowl anti-ice valve position disagrees with related valve position disagrees with related ENG ANTI-ICE switch position.ENG ANTI-ICE switch position.
Illuminated Illuminated dimdim blue – blue –Related engine cowl anti-ice valve is Related engine cowl anti-ice valve is fully open and therefore in agreement fully open and therefore in agreement with ENG ANTI-ICE switch position with ENG ANTI-ICE switch position (switch ON). Normal pressure 50 PSI(switch ON). Normal pressure 50 PSI
Extinguished –Extinguished –Related cowl anti-ice valve is closed Related cowl anti-ice valve is closed (switch OFF).(switch OFF).
Slide 15 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Engine Anti-Ice PanelEngine Anti-Ice PanelENGINE ANTI-ICE Switches:ENGINE ANTI-ICE Switches:ON –ON –Related engine cowl anti-ice valve is Related engine cowl anti-ice valve is signaled to open.signaled to open.
OFF –OFF –Related engine cowl anti-ice valve is Related engine cowl anti-ice valve is signaled to close.signaled to close.
Slide 16 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Wing Anti-Ice PanelWing Anti-Ice Panel
Slide 17 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Wing Anti-Ice PanelWing Anti-Ice PanelWing Anti-Ice (L & R) VALVE OPEN Lights:Wing Anti-Ice (L & R) VALVE OPEN Lights:Illuminated Illuminated brightbright blue – blue –Related wing anti-ice valve is in Related wing anti-ice valve is in transit, or transit, or related wing anti-ice related wing anti-ice valve position valve position disagrees with WING ANTI-ICE switch disagrees with WING ANTI-ICE switch position.position.
Illuminated Illuminated dimdim blue – blue –Related wing anti-ice valve is fully open and Related wing anti-ice valve is fully open and therefore in agreement with WING ANTI-ICE therefore in agreement with WING ANTI-ICE switch position (switch ON). Max switch position (switch ON). Max temperature 257 degree F / 125 degree Ctemperature 257 degree F / 125 degree C
Extinguished –Extinguished –Related wing anti-ice valve is closed Related wing anti-ice valve is closed (switch OFF).(switch OFF).
Slide 18 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Wing Anti-Ice PanelWing Anti-Ice PanelWING ANTI-ICE Switch:WING ANTI-ICE Switch:OFF –OFF –Both wing anti-ice valves are signaled Both wing anti-ice valves are signaled to close.to close.
ON (in flight) –ON (in flight) –Both wing anti-ice valves are signaled Both wing anti-ice valves are signaled to open.to open.
ON (on the ground) –ON (on the ground) –• Both wing anti-ice valves are signaled to Both wing anti-ice valves are signaled to open open ifif both thrust levers are below the both thrust levers are below the takeoff warning setting takeoff warning setting andand temperature temperature inside both distribution ducts is below inside both distribution ducts is below thermal switch activation temperature.thermal switch activation temperature.• Both wing anti-ice valves are signaled to Both wing anti-ice valves are signaled to close close ifif either thrust lever is above the either thrust lever is above the takeoff warning setting takeoff warning setting oror the thermal the thermal switch is activated in either distribution switch is activated in either distribution duct. Switch remains in ON position.duct. Switch remains in ON position.• Switch automatically moves to OFF upon Switch automatically moves to OFF upon air/ground system sensing “air” mode.air/ground system sensing “air” mode.
This concludes the review of the This concludes the review of the Anti-Ice Panels. The remainder of the Anti-Ice Panels. The remainder of the
presentation will discuss the anti-ice system presentation will discuss the anti-ice system in greater detail. Click in greater detail. Click NextNext to continue. to continue.
Slide 19 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Window Heat
L4L5R4 R5
L1L2L3
R1R2 R3Captain’s
forward windowFirst Officer’s forward window First Officer’s
side windowCaptain’s
side window
Captain’s overhead windowsFirst Officer’s overhead windows
Temperature controllers maintain the forward (L1, R1) and side windows (L2, R2) at the correct temperature to ensure maximum strength of the windows in the event of a bird strike. Power to the forward and side windows is automatically removed if an overheat condition is detected. A thermal switch attached to the aft overhead windows (L5, R5). This thermal switch opens and closes to maintain the correct temperature of the overhead windows (see schematic next slide). Windows L3 and R3 are not electrically heated.
Slide 20 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Window Overheat TestWindow Overheat TestUse the OVHT test to simulate an overheat condition of the window heat system. This test will ensure Use the OVHT test to simulate an overheat condition of the window heat system. This test will ensure that window overheat protection is operating normally.that window overheat protection is operating normally.
Click here to see a demonstrationClick here to see a demonstrationof the OVHT testof the OVHT test
Slide 21 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Window Heat Power TestWindow Heat Power TestUse PWR TEST whenever one or more green ON lights Use PWR TEST whenever one or more green ON lights do notdo not illuminate when the WINDOW HEAT illuminate when the WINDOW HEAT switches are positioned to ON. This will provide a confidence test to ensure that the window heat system switches are positioned to ON. This will provide a confidence test to ensure that the window heat system is operating normally. is operating normally.
Click here to see a demonstrationClick here to see a demonstrationof the PWR TESTof the PWR TEST
Slide 22 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Window Heat Schematic
L1 R1 R2 R3L2L3
L5 L4 R4 R5
VENTED TOFLIGHT DECK
VENTED TOFLIGHT DECK
THERMAL SWITCH
WIND-SHIELD
AIR
WIND-SHIELD
AIRFROMAIR CONDITIONING
SYSTEM
TEMPERATURE CONTROLLER
TEMPERATURE CONTROLLER
TEMP CONT
TEMP CONT
Slide 23 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Pitot-Static Probe and Sensor HeatPitot-Static Probe and Sensor Heat
See picture of pitot-static See picture of pitot-static probes associated probes associated with lights abovewith lights above
See picture of pitot-staticSee picture of pitot-static probes associatedprobes associatedwith lights above with lights above
All pitot-static probes, the total temperature probe (TAT PROBE), and the angle of airflow sensors All pitot-static probes, the total temperature probe (TAT PROBE), and the angle of airflow sensors (L, R ALPHA VANE) are electrically heated to prevent the formation of ice. The two alternate static (L, R ALPHA VANE) are electrically heated to prevent the formation of ice. The two alternate static ports are not heated.ports are not heated.
See picture of alternateSee picture of alternatestatic port static port
Slide 24 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Engine Anti-IceThe engine anti-ice system utilizes bleed air from the 5th or 9th stage of the high pressure compressor section. Only the engine cowl lip is anti-iced. The cowl anti-ice valve is electrically activated and pneumatically operated. Positioning the respective ENG ANTI-ICE switch to ON allows engine bleed air to flow through the cowl anti-ice valve to the cowl lip. While the cowl anti-ice valve is transitioning from closed to open, the COWL VALVE OPEN light illuminates bright blue. When the cowl anti-ice valve is fully open, the COWL VALVE OPEN light illuminates dim blue.
Engine bleed air
valve
To pneumaticsystem
Cowlanti-icevalve
9th
stage
5th
stage
Highstage valve
(9th)
No. 1 engine
See picture ofSee picture ofengine cowl lipengine cowl lip
Slide 25 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Engine Anti-IceIf the cowl anti-ice valve fails to move to the position selected by the ENG ANTI-ICE switch, the COWL VALVE OPEN light remains illuminated bright blue. The amber COWL ANTI-CE illuminates to indicate excessive pressure or temperature in the duct leading from the cowl anti-ice valve to the cowl lip. Engine anti-ice is available to the cowl lip even when the engine bleed air valve is closed. For example, during a BLEED TRIP, the engine bleed air valve is automatically signaled to close. This closure will not affect engine anti-ice availability for the respective engine.
Engine bleed air
valve
To pneumaticsystem
Cowlanti-icevalve
9th
stage
5th
stage
Highstage valve
(9th)
No. 1 engine
Slide 26 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Wing Anti-IceThe wing anti-ice system utilizes bleed air to protect the leading edge slats only. The wing anti-ice system does not include the leading edge flaps (Krueger flaps). The wing anti-ice valves are AC motor operated. With a valve open, bleed air flows to the leading edge slats via a telescoping duct. The bleed air is then exhausted overboard through small exhaust holes located on the lower surface of the slats. The wing anti-ice system is effective with the slats in any position (fully retracted, extended, or fully extended).
Leading Edge Flaps
(not heated)
Leading Edge Flaps
(not heated)
Leading Edge Slats
Leading Edge Slats
Slide 27 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Wing Anti-IceSystem operation on the ground: Positioning the WING ANTI-ICE switch to ON, signals the two (left & right) wing anti-ice valves to open. The valves will open if the thrust levers on both engines are below the setting for takeoff warning activation (approximately 32° thrust lever angle) and the temperature inside both wing distribution ducts is less than the thermal switch activation temperature. While the valves are transitioning from closed to open, the associated VALVE OPEN light will illuminate bright blue, and then illuminate dim blue when the respective valve is fully open.
Leading Edge Flaps
(not heated)
Leading Edge Flaps
(not heated)
Leading Edge Slats
Leading Edge Slats
Slide 28 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Wing Anti-IceSystem operation on the ground (continued): Both wing anti-ice valves are signaled to close if either thrust lever is above the setting for takeoff warning activation or the temperature inside either wing distribution duct senses over-temperature. In the event that the valves do close, the associated VALVE OPEN light illuminates bright blue to indicate disagreement between switch and valve position (WING ANTI-ICE switch remains in the ON position). The valves automatically re-open when both thrust levers are repositioned below the setting for takeoff warning activation and both temperature sensors are cool. VALVE OPEN lights now illuminate dim blue to indicate agreement between switch and valve position.
Leading Edge Flaps
(not heated)
Leading Edge Flaps
(not heated)
Leading Edge Slats
Leading Edge Slats
Slide 29 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Wing Anti-IceSystem operation in flight: During takeoff, when the air/ground sensing system detects being airborne, the WING ANTI-ICE switch automatically trips to the OFF position, which will result in the VALVE OPEN lights changing from bright blue to extinguished. The extinguishing of the VALVE OPEN lights indicate that the wing anti-ice valves are now fully closed, which is in agreement with the WING ANTI-ICE switch (OFF). Once in flight, thrust lever setting logic and distribution duct temperature are inhibited and have no affect on wing anti-ice valve operation, therefore both valves open when the WING ANTI-ICE switch is positioned to ON.
Leading Edge Flaps
(not heated)
Leading Edge Flaps
(not heated)
Leading Edge Slats
Leading Edge Slats
Slide 30 of 30PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational
Wing Anti-Ice Schematic
TELESCOPING DUCT
LEADING EDGE SLATS
PNEUMATICMANIFOLD
WING ANTI-ICEVALVE
WING DISTRIBUTION DUCT
RIGHTMAIN
LANDINGGEAR
GROUND
AIR
HIGHTEMP
LOWTEMP
THRUST LEVERS ABOVE T/O WARNING THRUST LEVERS BELOW T/O WARNING
THERMALSWITCH