DOC AIRBUS | TSM A320FLoss of the CFDIU Input on the GPSSU1
TASK 34-58-00-810-823-A
Loss of the CFDIU Input on the GPSSU1
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 34-58-00-740-094-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 34-58-00-810-072-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:33:34 UTC
Loss of the CFDIU Input on the GPSSU1
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 31-32-34-000-001 | Removal of the CFDIU |
| AMM 31-32-34-400-001 | Installation of the CFDIU |
| AMM 34-58-00-740-001 | BITE Test of the GPS |
| ASM 345801 | |
| AMM 34-58-31-000-001 | Removal of the GPSSU |
| AMM 34-58-31-400-001 | Installation of the GPSSU |
Subtask 34-58-00-740-094-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 34-58-00-810-072-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message CFDIU (1TW)/GPSSU1 (1SN1):
Subtask 34-58-00-740-095-A ** ON A/C NOT FOR ALL - replace the
[1SN1] AMM 34-58-31-000-001 and AMM 34-58-31-400-001.
- replace the CFDIU [1TW] AMM 31-32-34-000-001 and AMM 31-32-34-400-001.
- do a check and repair the wiring between the CFDIU and the GPSSU1 : pins AA/2B, 2C and A/31, 32 ASM 345801.
B. Do the test given in Para. 3.