DOC AIRBUS | TSM A320FFailure of the Pin Programming of the GAPCU
TASK 24-41-00-810-820-A
Failure of the Pin Programming of the GAPCU
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 24-41-00-740-058-A ** ON A/C NOT FOR ALL
Subtask 24-41-00-810-084-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:26:54 UTC
Failure of the Pin Programming of the GAPCU
1. Possible Causes
- GAPCU [24XG]
- wiring
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 24-41-00-740-002 | Operational Check of the GAPCU via the CFDS |
| ASM 244101 | |
| AMM 24-41-34-000-001 | Removal of the Ground Power Control Unit (GPCU) |
| AMM 24-41-34-400-001 | Installation of the Ground Power Control Unit (GPCU) |
Subtask 24-41-00-740-058-A ** ON A/C NOT FOR ALL
A. Test
(1) Do the BITE test of the GAPCU AMM 24-41-00-740-002.
(a) If the BITE test gives the message TEST FAILED:
4. Fault Isolation(1) Do the BITE test of the GAPCU AMM 24-41-00-740-002.
(a) If the BITE test gives the message TEST FAILED:
- do the trouble shooting given in Para 4.A.
- do the trouble shooting given in Para 4.B.
Subtask 24-41-00-810-084-A ** ON A/C NOT FOR ALL
A. If the BITE test gives the message TEST FAILED:
Subtask 24-41-00-810-063-A ** ON A/C NOT FOR ALL - push the line key adjacent to the TEST FAILED message.
- replace the GAPCU [24XG] AMM 24-41-34-000-001 and AMM 24-41-34-400-001.
B. If the BITE test gives the message TEST PASSED:
Subtask 24-41-00-740-059-A ** ON A/C NOT FOR ALL - do a check of the pin programming wiring ASM 244101 of the GAPCU:
. pin A/4G connected to ground
. pins A/3E, A/5E and A/5A not connected.
NOTE: The wiring diagram of the aircraft interface with the pin programming connections is necessary to do the trouble shooting procedure.
(1) If the wiring is not correct: - repair or replace as necessary.
- replace the GAPCU [24XG] AMM 24-41-34-000-001 and AMM 24-41-34-400-001.
C. Do the test given in Para. 3.