Mar 2017 Page 66
© 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
7 TESTING AND FAULT ISOLATION
7.1 GENERAL
This section covers the method used to confirm that an
equipment is fit for service (verification) and procedures to
isolate faulty electronic assemblies within the equipment
(fault isolation).
Verification of the DAFR equipment utilises the internal status
and built-in test (BIT) display provided by the web server,
and embedded diagnostic functions that may be run remotely
over the web interface.
Fault isolation is approached on two levels. First, using the
embedded diagnostic functions provided by the web server
and, second, through partial disassembly and observation of
internal indicators and test points.
These operations shall be carried out with the equipment
removed from the aircraft. The recording functions of the
DAFR cannot be verified directly without special to type test
equipment or, alternatively, fitment in a known good aircraft
installation. Procedures for verifying the recording functions
as part of the installation check can be found in the CHECK
section of this manual.
The equipment should be returned to the manufacturer for
repair if a fault is present that cannot be isolated to
subassembly level using these instructions.
7.2 PART ONE (VERIFICATION)
7.2.1 General
(1) This section details how the web based Status Page
display and internal diagnostics functions may be
accessed and interpreted.
(2) Verification is performed at a level which checks the
operation of the low-level hardware and software
functions used to implement the FDR and CVR
functions visible to the operator, such as recording and
download.
(3) Following successful verification it is recommended
that the unit under test is subjected to recording and
download checks as described in the CHECK section of
this manual.
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