Mar 2017
Page 70
© 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
NOTE:
It may be possible for the repair function to identify
and 'map out' the sectors causing a disk check failure.
If the DAFR is unable to fix the errors when the disk
repair is run, the fault is most likely to be in the Crash
Box assembly and the DAFR is to be returned to Penny
& Giles Aerospace Limited for repair.
Run Disk Repair
This option allows the operator to attempt to fix disk errors
without running the disk check first.
Run Benchmarking
This function is reserved for use by the manufacturer.
ROM Test
This function verifies that a series of test patterns in the
program storage area of internal memory can be read
correctly.
RAM Test
This function verifies that a series of test patterns can be
written to the data storage area of internal memory and
that they can be read back correctly.
Program Checksum Test
This function computes a checksum from the contents of the
program storage area of internal memory and compares the
result with the checksum already programmed in the DAFR.
Config Checksum Test
This function computes a checksum from the contents of the
equipment configuration storage area of internal memory and
compares the result with the checksum already programmed
in the DAFR.
7.3 PART TWO (FAULT ISOLATION)
7.3.1 General
Carry out the verification sequence detailed in section 7.2
PART ONE (VERIFICATION).
Refer to the fault isolation flowcharts (Figure 12 and figure
12).
if an entry in the status table is different from the expected
value.
