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737-600/700/800/900 TRAINING MANUAL
GROUND CREW
CALL HORN
PASSENGER SIGNS PANEL
737 GENERAL - CREW CALL OPERATION
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737 GENERAL -- SERVICE INTERPHONE SYSTEM General
The ground crew uses the service interphone system to talk to each other and to the flight crew. Service interphone jacks are at different locations on the airplane.
The flight attendants use the service interphone system to speak with each other and the pilots.
Components
The service interphone system has these components:
-Service interphone jacks
-Attendant handsets
-Service interphone switch.
The pilots can use the flight interphone system to interface with the service interphone system.
Operation
From the flight compartment, you select the service interphone function with the audio control panel (ACP). Push the service interphone mic selector switch and adjust the receiver volume control.
The attendant handset automatically connects into the service interphone system when the handset is removed from the cradle.
737-600/700/800/900 TRAINING MANUAL
The ground crew hears audio when a headset connects to a service interphone jack. For other stations to hear the ground crew, the service interphone switch must be ON.
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737-600/700/800/900 TRAINING MANUAL
-FLIGHT INTERPHONE
-MICROPHONES
-HEADSETS
-SPEAKERS
OFF
ON
SERVICE INTERPHONE
SWITCH
AUDIO CONTROL PANEL (3)
FLIGHT COMPARTMENT
SERVICE INTERPHONE RECEIVE VOLUME CONTROL
ATTENDANT
HANDSET (2)
PASSENGER CABIN
SERVICE INTERPHONE
JACK (7)
00-00-00-235 Rev 1 09/14/2000
737 GENERAL - SERVICE INTERPHONE SYSTEM
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737-600/700/800/900 TRAINING MANUAL
737 GENERAL -- VHF COMMUNICATION SYSTEM OPERATION
General
You use these components to operate the VHF radio:
-Microphone or headset
-VHF control panel
-Audio control panel.
Receive Operation
You use the VHF control panel and the audio control panel to receive transmissions on the VHF radio.
On the audio control panel, push the receiver volume control for the VHF radio. Turn the control to adjust the volume from the VHF radio.
You hear audio on the headset and the flight interphone speakers. To hear sound from the flight interphone speakers, push the speaker (SPKR) volume control to turn on the speaker. Turn the control to adjust the volume of sound from the speaker.
To tune the radio to a new frequency, use the frequency selectors for the frequency indicator that is not active.
When you are sure the frequency is correct, move the VHF comm transfer switch. The active frequency indicator light for new frequency comes on. The VHF radio uses the new frequency.
Listen to the audio from the VHF radio on the speaker or headset. Adjust the volume control switches on the audio control panel for a comfortable sound level.
Transmit Operation
Make sure the frequency indicator shows the frequency you want to transmit. Make sure the frequency you select is a valid transmit frequency.
Push the microphone selector switch on the audio control panel for the VHF radio.
Listen for transmissions on the frequency you selected. When the frequency is clear and you want to transmit a message, key the mic and speak into it. You hear sidetone in the headphone and muted sidetone from the speaker. The flight interphone system mutes the sidetone to the speaker when you use the boom mic or the hand mic.
You can continue to transmit and receive on the frequency you selected.
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737-600/700/800/900 TRAINING MANUAL
00-00-00-236 Rev 1 04/16/1999
MIC SWITCH
R/T
HAND
AUDIO CONTROL PANEL MICROPHONE CONTROL WHEEL
TFR
PTT SOURCE
V C
H FREQ SEL M O
F M
VHF CONTROL PANEL
1-VHF
AUDIO CONTROL PANEL (VHF SELECT)
737 GENERAL - VHF COMMUNICATION SYSTEM OPERATION
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737-600/700/800/900 TRAINING MANUAL 737 GENERAL -- MAIN LANDING GEAR DOWNLOCK PIN General
You install a downlock pin into the main landing gear (MLG) to prevent an outside force from unlocking the main landing gear.
There is one main landing gear downlock pin for each main landing gear.
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