DOC AIRBUS | TSM A320FLoss of the CFDIU Discrete Signal to the GPCU
TASK 24-41-00-810-808-A
Loss of the CFDIU Discrete Signal to the GPCU
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 24-41-00-710-064-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 24-41-00-810-057-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:26:53 UTC
Loss of the CFDIU Discrete Signal to the GPCU
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 24-41-00-740-004 | Operational Check of the GPCU via the CFDS |
| 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) |
| ASM 313206 | |
| AMM 31-32-34-000-001 | Removal of the CFDIU |
| AMM 31-32-34-400-001 | Installation of the CFDIU |
Subtask 24-41-00-710-064-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 24-41-00-810-057-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message CHECK GPCU PIN A4B CFDIU 1TW PIN A9K WIRING:
Subtask 24-41-00-710-065-A ** ON A/C NOT FOR ALL - replace the GPCU [1XG] AMM 24-41-34-000-001 and AMM 24-41-34-400-001.
- replace the CFDIU [1TW] AMM 31-32-34-000-001 and AMM 31-32-34-400-001.
- do a check and repair the wiring from the pin AA/4B of the GPCU (1XG) to the pin AA/9K of the CFDIU (1TW) ASM 313206.
B. Do the test given in Para. 3.