B737-300/400 Communications

Slide 1 of 24PT. METRO BATAVIAPT. METRO BATAVIADirectorate of OperationalDirectorate of Operational

737-300/400737-300/400COMMUNICATIONSCOMMUNICATIONS

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Audio Selector PanelAudio Selector Panel(ASP)(ASP)


MIC SELECTOR (Transmitter Selector) MIC SELECTOR (Transmitter Selector) Switches:Switches:Illuminated –Illuminated –Related switch is active.Related switch is active.

Push –Push –• Selects related communication system for Selects related communication system for

transmission.transmission.• Only one switch may be selected at a time; Only one switch may be selected at a time;

pushing a different switch deselects active pushing a different switch deselects active switch.switch.• Receiver is also selected regardless of Receiver is also selected regardless of whether or not related receiver switch is whether or not related receiver switch is “on.”“on.”




Receiver Switches:Receiver Switches:Illuminated – Illuminated – Related switch is active.Related switch is active.

Push –Push –• Receiver selected for related Receiver selected for related communication system or navigation communication system or navigation receiver.receiver.• More than one switch may be selected More than one switch may be selected at a time.at a time.

Push again – Push again – Deselects related system or receiver.Deselects related system or receiver.

Rotate – Rotate – Adjusts volume.Adjusts volume.



SPKR Switch:SPKR Switch:Illuminated – Illuminated – SPKR switch is active.SPKR switch is active.

Push – Push – Audio from selected receiver switches is Audio from selected receiver switches is heard from overhead speaker.heard from overhead speaker.

Push again –Push again –Deselects audio from selected receiver Deselects audio from selected receiver switches to be heard from overhead switches to be heard from overhead speaker.speaker.

Rotate – Rotate – Adjusts overhead speaker volume.Adjusts overhead speaker volume.



Push-to-talk Switch:Push-to-talk Switch:(spring-loaded to center)(spring-loaded to center)R/T (radio-transmit) – R/T (radio-transmit) – Keys boom or oxygen mask microphone for Keys boom or oxygen mask microphone for transmission as selected by transmitter transmission as selected by transmitter selector.selector.

I/C (intercom) –I/C (intercom) –Keys boom or oxygen mask microphone for Keys boom or oxygen mask microphone for direct transmission over flight interphone direct transmission over flight interphone and bypasses transmitter selector.and bypasses transmitter selector.



MASK-BOOM Switch:MASK-BOOM Switch:MASK –MASK –Selects oxygen mask for transmissions.Selects oxygen mask for transmissions.

BOOM –BOOM –Selects boom microphone for Selects boom microphone for transmissions.transmissions.



Filter Switch:Filter Switch:V (voice) –V (voice) –Receive NAV and ADF voice.Receive NAV and ADF voice.

B (both) –B (both) –Receive NAV and ADF voice and range Receive NAV and ADF voice and range signals.signals.

R (range) –R (range) –Receive NAV and ADF station identifier Receive NAV and ADF station identifier range (code) audio.range (code) audio.



ALT-NORM Switch:ALT-NORM Switch:NORM (normal) –NORM (normal) –ASP operates normally.ASP operates normally.

ALT (alternate) –ALT (alternate) –ASP operates in degraded mode ASP operates in degraded mode (see slide 19 for more information).(see slide 19 for more information).


VHF Communication PanelVHF Communication Panel

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11 AS INSTALLEDAS INSTALLED


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Frequency Indicator:Frequency Indicator:Indicates selected frequency.Indicates selected frequency.


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VHF Communication Transfer (TFR) Switch:VHF Communication Transfer (TFR) Switch:Selects which frequency is active for the Selects which frequency is active for the transceiver.transceiver.


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Active Frequency Light:Active Frequency Light:Illuminated –Illuminated –Indicates associated frequency is selected.Indicates associated frequency is selected.


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FREQ SEL (Frequency Selector):FREQ SEL (Frequency Selector):Rotate –Rotate –• Outer selector changes three left digits.Outer selector changes three left digits.• Inner selector changes two right digits.Inner selector changes two right digits.


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COMM TEST Switch:COMM TEST Switch:Push –Push –• Removes automatic squelch feature, Removes automatic squelch feature, permitting reception of background noise permitting reception of background noise and thereby testing receiver operation.and thereby testing receiver operation.• Improves reception of weak signals.Improves reception of weak signals.


Miscellaneous Communication Controls(typical configuration in flight deck)

Overhead Speaker

Boom Microphone /

HeadsetHeadphones

Oxygen Mask Microphone

Hand Held MikePush-to-talk Switch

CommunicationJacks

BOOM MIKE HEAD PHONE HAND MIKE

Hand Microphone

(view from back)

MIC

INT

Control WheelPush-to-talk Switch• MIC (Microphone) –

Selects oxygen mask or boom microphone for transmission, as selected by ASP.

• INT (Interphone) –Selects oxygen mask or boom microphone for direct transmission over flight interphone.


Interphone and PassengerAddress Controls

See picture of See picture of service interphoneservice interphone

switchswitch

See picture ofSee picture ofinterphone jacksinterphone jacks

on external poweron external powerconnector panelconnector panel

Service Interphone Switch

(see slide 23 for more info)

SERVICEINTERPHONE

OFF

ON

INTERPHONE

FLIGHT SERVICE

LOCATED ON AFT OVERHEAD PANEL

Flight InterphoneJack

Service InterphoneJack

Passenger Address Hand Microphone:Used to make PA announcements

Service Interphone Handset:Used to communicate with flight attendant stations. Also used to communicate with any external jack location when SERVICE INTERPHONE switch is ON.

LOCATED ON EXTERNAL POWER CONNECTOR PANEL

VIEW OF BACK SIDE OF CONTROL STAND


Call System

ATTEND

CALL

GRDCALL

PILOT

CALL

CALL SYSTEM

CAPTAIN ATTENDANT RESET

Ground Call Switch:Sounds a horn in nose gear wheel well until released.

Attendant Call Switch:Sounds a two-tone chime in passenger cabin. Illuminates both pink master call lights.

Flight Deck CALL Light:Illuminated (blue) – Flight deck is being called by flight attendants or ground crew. Extinguishes when CAPTAIN CALL or PILOT CALL switch released.

LOCATED ON FWD OVERHEAD PANEL

LOCATED ON FWD AND AFT CEILING OF PASSENGER

CABIN

LOCATED ON EXTERNAL POWER

CONNECTOR PANELLOCATED ON

FLIGHT ATTENDANT PANELS

Pilot Call Switch:Push – Sounds a single-tone chime in flight deck. Flight deck CALL light extinguishes when switch is released.

Captain Call Switch:Push – Sounds a single-tone chime in flight deck. Flight deck CALL light extinguishes when switch is released.

Attendant Call Switch:Push – Sounds a two-tone chime in passenger cabin. Illuminates both pink master call lights.

Call Reset Switch:Push – Extinguishes both pink master call lights.

Master Call Lights:Illuminated – • Amber – A lavatory call switch

is activated or smoke has been detected in a lavatory.

• Pink – Flight deck or other flight attendant station is calling.• Blue – A passenger seat call

switch is activated.

This concludes the general This concludes the general review of thereview of the

Communication system.Communication system.The remainder of theThe remainder of the

presentation will discuss presentation will discuss some extra details. some extra details.

Click Click NextNext to continue. to continue.


Audio Selector Panel (ASP)Audio Selector Panel (ASP)Degraded Audio SystemDegraded Audio System

If the remote electronics unit (located in the E&E bay) or ASP malfunctions, the ASP cannot control the If the remote electronics unit (located in the E&E bay) or ASP malfunctions, the ASP cannot control the remote electronics unit. Audio system operation can be switched to a degraded mode by placing the remote electronics unit. Audio system operation can be switched to a degraded mode by placing the ALT-NORM switch to ALT. In this mode, the ASP at that station (Captain, First Officer, or observer) is ALT-NORM switch to ALT. In this mode, the ASP at that station (Captain, First Officer, or observer) is inoperative and the crewmember can only communicate on one radio.inoperative and the crewmember can only communicate on one radio.



The picture below depicts which items are operable and which items are inoperable when the Captain’s The picture below depicts which items are operable and which items are inoperable when the Captain’s ASP ALT-NORM switch is positioned to ALT.ASP ALT-NORM switch is positioned to ALT.

inopinop

OKOK

• Captain’s control Captain’s control wheel push-to-talk wheel push-to-talk switch “MIC” position switch “MIC” position

OK.OK.

• Captain’s control Captain’s control wheel push-to-talk wheel push-to-talk switch “INT” position switch “INT” position

inop.inop.

• Handheld mic inop.Handheld mic inop.

• Transmitter selector Transmitter selector switches inop. switches inop.

Transmit on VHF – 1 Transmit on VHF – 1 only.only.

• Receiver switches Receiver switches inop. Pre-set volume inop. Pre-set volume

on headset.on headset.

• Boom and oxygen Boom and oxygen mask mic’s OK.mask mic’s OK.

• Overhead speaker Overhead speaker inop.inop.

• Push-to-talk switch Push-to-talk switch “R/T” position OK.“R/T” position OK.

• Push-to-talk switch Push-to-talk switch “I/C” position inop.“I/C” position inop.



The picture below depicts which items are operable and which items are inoperable when the First The picture below depicts which items are operable and which items are inoperable when the First Officer’s ASP ALT-NORM switch is positioned to ALT.Officer’s ASP ALT-NORM switch is positioned to ALT.

inopinop

OKOK

• First Officer’s control First Officer’s control wheel push-to-talk wheel push-to-talk

switch “MIC” position switch “MIC” position OK.OK.

• First Officer’s control First Officer’s control wheel push-to-talk wheel push-to-talk

switch “INT” position switch “INT” position inop.inop.

• Handheld mic inop.Handheld mic inop.






• Overhead speaker Overhead speaker inop.inop.





The picture below depicts which items are operable and which items are inoperable when the observer’s The picture below depicts which items are operable and which items are inoperable when the observer’s ASP ALT-NORM switch is positioned to ALT.ASP ALT-NORM switch is positioned to ALT.

inopinop

OKOK









Service InterphoneThe Service Interphone provides intercommunication between the flight deck, flight attendants, and ground personnel. Flight deck crew members communicate utilizing the service interphone handset (if installed on control stand) or their respective boom microphone via the ASP. In addition, several external jacks for use by maintenance or ground personnel can be activated by positioning the service interphone switch to ON.

External service interphone jack located near access door leading to horizontal stabilizer jackscrew.

External service interphone jack located on external power connector panel.

External service interphone jack located in E&E bay.

External service interphone jack located near aircraft right wing root.

External service interphone jack located near aircraft left wing root.

External service interphone jack located on fueling panel.

External service interphone jack located on ceiling near aft lavatory.


Antenna LocationsVOR/LOC

ADF SENSE (left side)

AIRPHONE

MARKER BEACON

DME 2

ADF LOOP 1

VHF COMM 2

DME 1

RA RECEIVE 2

RA TRANSMIT 2

RA TRANSMIT 1RA RECEIVE 1

ATC 2ATC 1

TCAS

DUAL LOCALIZER ANTENNA

WEATHER RADAR

GLIDESLOPE

TCASVHF COMM 1

Engineering

B737-300/400 Communications