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station cards. Microphone audio goes to the flight interphone
jack.
The AAU card amplifies audio from the external flight
interphone jack and sends it to station cards.
The service interphone amplifier amplifies these inputs:
* Audio from attendant handsets
* Audio from service interphone jacks
* Microphone audio when service interphone is set on the
ACP.
FLIGHT INTERPHONE SYSTEM - REMOTE ELECTRONICS UNIT FUNCTIONAL DESCRIPTION
EFFECTIVITY
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This audio goes to service interphone jacks and station cards.
Emergency Signals
Emergency operation bypasses all active circuitry in the system
to maintain communications between the aircraft and ground
stations.
Microphone audio and PTT signals from the CAPT and OBS
stations go directly to the VHF 1 transceiver. Microphone audio
and PTT signals from the F/O station goes to the VHF 2
transceiver.
Received audio from the VHF 1 transceiver goes to the CAPT
and OBS station headsets. Received audio from the VHF 2
transceiver goes to the F/O station headset.
FLIGHT INTERPHONE SYSTEM - REMOTE ELECTRONICS UNIT FUNCTIONAL DESCRIPTION
EFFECTIVITY
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FLIGHT INTERPHONE SYSTEM - REMOTE ELECTRONICS UNIT FUNCTIONAL DESCRIPTION
FLIGHT INTERPHONE SYSTEM - REMOTE ELECTRONICS UNIT FUNCTIONAL DESCRIPTION
EFFECTIVITY
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General
This page is for reference.
FLIGHT INTERPHONE SYSTEM - SYSTEM SUMMARY
EFFECTIVITY
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FLIGHT INTERPHONE SYSTEM - SYSTEM SUMMARY
FLIGHT INTERPHONE SYSTEM - SYSTEM SUMMARY
EFFECTIVITY
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Purpose
There are static dischargers on the airplane to decrease radio
receiver interference. The static dischargers discharge static at
points as far from the fuselage as possible. This makes sure
there is the least amout of coupling into the radio receiver
antennas.
Characteristics
Each discharger has a carbon fiber tip at the end of a slender
rod. The rod is a resistive (conducting) material and attaches to
a metal base. The base attaches and bonds to the airplane
surface.
There are trailing edge and tip dischargers. The tip dischargers
are smaller than the trailing edge dischargers.
Location
The vertical fin and each wing has a tip discharger and three
trailing edge dischargers. Each side of the horizontal stabilizer
has a tip discharger and two trailing edge dischargers.
STATIC DISCHARGERS
EFFECTIVITY
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STATIC DISCHARGERS
STATIC DISCHARGERS
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General
The voice recorder continuously records these:
* Flight crew communications
* Flight compartment sounds.
The voice recorder keeps the last 120 minutes of audio.
Abbreviations and Acronyms
* ACP - audio control panel
* A/D - analog-to-digital
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