Kannad aviation CS144, Abbreviated Component Maintenance Manual

Page: 4 / 18

25-63-50
© Orolia S.A.S.
Abbreviated Component Maintenance Manual
S1825501-01 / S1825501-02
Page 4
AUG 12/2013
D. Memory replacement
Replacement of the memory (See TASK 25-63-50-000-801A01 , para D and TASK 25-63-50-400-
801A01 , para B) is mandatory every 16000 flight hours or 10 years whichever comes first.
The manpower estimated time is 20 minutes.
Necessary parts to perform this task are available in an EEPROM replacement Kit, S1825515-01:
E. Upgrade
(1) CR12 replacement
Operation troubles have been identified with CS144 interface modules when connected to an ELT
with a new battery:
- the test of the ELT by RCP via CS144 may be faulty,
- the ON position of RCP may trigger a self-test on the ELT.
This is due to a battery with a high nominal voltage with regards to the clamping voltage of the CR12
protection: the CR12 protection (LCDA05) must be replaced by a protection with a higher clamping
voltage (LCDA12).
This replacement (See TASK 25-63-50-000-801A01 , para E and TASK 25-63-50-400-801A01 , para
C) should be performed if this failure occurs or during maintenance.
The manpower estimated time is 20 minutes
Necessary parts to perform this task are available in a CR12 replacement Kit, S1825515-02:
PART NUMBER NOMENCLATURE
1 2 3 4 5 6 7
UNIT
PER
ASSY
S1825515-01 KIT, EEPROM REPLACEMENT 1
0123841 . WEDGE, FOAM 1
0123831 . CAPSULE, DESICCANT 1
0124115 . O-RING SIL 2.4
DIA 138
1
0125267 . MEMORY CIRCUIT
93C66 DIP 8
1
0123305 . LABEL, MEMORY
(EES01670)
1
PART NUMBER NOMENCLATURE
1 2 3 4 5 6 7
UNIT
PER
ASSY
S1825515-02 KIT, CR12 REPLACEMENT 1
0123831 . CAPSULE, DESICCANT 1
0124115 . O-RING SIL 2.4
DIA 138
1
0135639 . CHIP, CIRCUIT PROTECTION
LCDA12. TB
1