Mar 2017 Page 44
© 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.
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
5.2.2 ERASE Pushbutton
Operation of the ERASE pushbutton for at least two seconds
will initiate a Voice Erase Cycle, providing any external
interlocks are satisfied. The erase cycle lasts for
approximately five seconds during which period the CVR FAIL
indicator will flash. The erase function is applicable to the
Cockpit Voice Recorder audio information only, FDR
parameter data is not affected by Voice Erase.
5.2.3 FDR RCRD Switch (FDR INHIBIT)
Operation of the FDR RCRD (FDR INHIBIT) switch provides an
enable signal to the DAFR overriding aircraft installation
interlocks for the purpose of FDR subsystem ground test.
5.2.4 CVR FAIL Indicator
Steady illumination of the CVR FAIL indicator, indicates either
that a fault in the CVR subsystem has been detected by the
DAFR BIT function, or that the DAFR has been put into a non-
recording mode. A non recording mode may be enabled when
the Record On link is not fitted or within 10 minutes of the
assertion of the Stop CVR Recording control input.
Flashing of the CVR FAIL indicator occurs during data
recovery or voice erase modes. Refer to section 1.2.1
Operational Modes for further details.
5.2.5 FDR FAIL Indicator
Steady illumination of the FDR FAIL indicator, indicates either
that a fault in the FDR function has been detected by the
DAFR BIT function, or that the DAFR has been put into a non-
recording mode e.g. the Record On link is not fitted. The FDR
FAIL indicator will also illuminate if valid data is not received
at the input.
Flashing of the FDR FAIL indicator occurs during data
recovery modes. Refer to 1.2.1 Operational Modes for further
details.
5.2.6 Headphone Jack
The Headphone Jack allows monitoring of the received audio
signals. The audio signal is the sum of all channels.
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