Mar 2017 Page 29
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.
The presence of a failure of any of the above tests for more
than 100 milliseconds will cause a CVR FAULT status to be
asserted. Should the fault clear, the CVR FAULT indication will
be removed.
Pilot Initiated Tests
At any time after the power-up tests a full system check, as
detailed in the Status Monitoring section above, may be
initiated from the cockpit by the Push-to-Test (PTT) control
input to the DAFR. This action has the effect of resetting the
processors and thus aborts any current operation. The FDR and
CVR FAULT outputs will be asserted for the duration of the BIT
function, after which each is asserted only if its associated
tests were failed.
Power Interruptions
Power Interruption ≤200 milliseconds
At normal power level, interruptions with duration of 200
milliseconds or less have no effect.
Power Interruption >200 milliseconds
At normal, abnormal and emergency power levels,
interruptions with durations of more than 200 milliseconds may
cause a reset condition. When power is restored, a power-up
BIT routine is initiated as defined the Power-up Tests section
above.
Download
Selection of an FDR download interrupts the recording process
of the DAFR. The CVR is prohibited from downloading recorded
information while recording on the aircraft.
Data Recovery
FDR data can be downloaded without removing the equipment
from the aircraft via the MTI to suitable Portable Replay
Equipment (PRE), details of which are the subject of a separate
operating manual. Recovery of the aircraft data record using
such equipment can be achieved within three minutes.
CAUTION:
During recovery of data, no data recording takes place.
Audio Recovery
Audio can be recovered only when the DAFR has been removed
from the aircraft. Audio is recovered via the MTI requiring the
replay equipment detailed in section 6.7, CVR REPLAY.
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