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Audio Control Panel Input
The audio panels provide audio inputs to the CVR for recording flight crew voice communications and other flight compartment audio signals.
Audio Control Panel
GF0610_059
The various audio signals are summed together in the audio panels to form a single audio input to the CVR from each audio panel.
Rev 3, Apr 25, 2005 Flight Crew Operating Manual Volume 2 CSP 700.5000.6 06.10.29
COCKPIT VOICE RECORDER MICROPHONE MONITOR
ERASE TEST
STATUS HEADPHONE
AREA MIC
IMPACT SWITCH
DAU 4 (GMT)
AUDIO PANEL 2
(If installed)
AUDIO PANEL 3 AUDIO PANEL 1
GF0610_060
Volume 2 Flight Crew Operating Manual Rev 3, Apr 25, 2005
The cockpit voice recorder microphone monitor panel “TEST”, “STATUS” and “ERASE” functions are as follows:
. TEST . Push and hold the “TEST” push-button for approximately one second to activate the CVR internal self-test.
A successful test will result in the green “STATUS” LED illuminating for one second and a two second aural tone will be heard using the headphone.
NOTE
If a failure occurs during the self test, the green “STATUS” LED will illuminate continuously and no aural tone will be heard.
.
STATUS . The operation of the green “STATUS” LED is described above under the “TEST” function.
.
ERASE . The “ERASE” push-button is used to initiate a memory erase sequence within the CVR. The CVR logic ensures that the “ERASE” function is only enabled when the airplane is on the ground (WOW) and the parking brake set.
Rev 3, Apr 25, 2005 Flight Crew Operating Manual Volume 2
The Flight Data Recorder (FDR) is a crash survivable data recorder capable of retaining up to 25 hours of airplane parameters/flight data. The FDR system consists of:
.
Solid state flight data recorder.
.
High-G accelerometer.
The High-G accelerometer is mounted in the airplane landing gear bay and provides the normal acceleration data for the FDR system.
The DAU 4 receives airplane parameters/flight data from various systems and normal acceleration input from a dedicated accelerometer. The FDR receives its systems information from DAU 4 and sends status information back to the DAU 4. A FDR self-test is performed on airplane power-up and if a failure is detected at any time (including self-test), an advisory message will be displayed on EICAS.
Volume 2 Flight Crew Operating Manual Rev 12, Aug 14, 2006
An Underwater Locator Beacon (ULB) is attached to the CVR as part of the handle to help locate it in the event of a crash.
BEACON
The ULBs operating frequency is 37.5 KHz and will operate for 30 days.
EMERGENCY LOCATOR TRANSMITTER
The Emergency Locator Transmitter (ELT) consists of:
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