Mar 2017 Page 19
DATA ACQUISITION FLIGHT RECORDER Type D51615-202-XXX or D51615-
202-XXX-090 with CCU Type D51616-XXXX and CAM Type D51623-XXXX
Installation and Operating Manual with Illustrated Parts
List
Commercial in Confidence
PIM434-I
© Penny & Giles Aerospace Ltd. No part of this work may be reproduced or distributed by any means
without prior permission in writing from the copyright owner.
PUSH TO TEST - Open circuit
RECORD ON - Jumper fitted
FDR INHIBIT - Open circuit
Input data is continuously acquired as defined by the
configuration file. The data is formatted and sequentially
written to the protected memory array in a manner consistent
with the segregation and partitioning requirements of ED112
for combined voice and data recorders.
If valid data is not detected, then the FDR FAULT output will be
asserted. Should valid data be detected then the FDR FAULT
output will go inactive. If the FDR FAULT output is asserted
then Data Monitor output signal is held grounded.
Data is validated on a ‘read-after-write’ basis internal to the
recorder only.
Record (CVR Audio Only)
The Record (CVR Audio Only) mode is the normal operational
mode for the Cockpit Voice Recorder subsystem.
The states of the control lines to initiate this mode are as
follows:
STOP CVR RECORDING - High
RECORD ON - Jumper fitted
PUSH TO TEST - High
VOICE ERASE A - Low or open circuit
FDR INHIBIT - Don’t Care
Audio information is digitized and sequentially written to the
crash survivable memory module in a method consistent with
the segregation and partitioning requirements of ED112 for
combined voice and data recorders. An output is provided that
is a summed signal of all four input channels. Any failure in the
digitizing or storage process exceeding a continuous period of
100 milliseconds or cumulative period of 250 milliseconds will
cause the CVR FAULT output to become active. Should the
failure clear, then the CVR FAULT output will go inactive. If the
CVR FAULT output is asserted the Audio Monitor output signal
is held grounded.
Timed Record (Audio)
The Timed Record mode is intended to prevent the audio
information recorded from being overwritten in the event of
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