DOC AIRBUS | TSM A320FLoss of the ADR Input or Computed Airspeed
TASK 34-48-00-810-806-A
Loss of the ADR Input or Computed Airspeed
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 34-48-00-740-060-C 4. Fault Isolation
Subtask 34-48-00-810-056-A
[Rev.8 from Aug 2018]
2026.04.04 04:33:14 UTC
Loss of the ADR Input or Computed Airspeed
1. Possible Causes
- GPWC [1WZ]
wiring of the AIR DATA INPUT bus from the GPWC (1WZ) to the first terminal block
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 34-48-00-740-002 | BITE Test of the GPWS |
| ASM 344801 | |
| AMM 34-48-34-000-001 | Removal of the GPWC |
| AMM 34-48-34-400-001 | Installation of the GPWC |
Subtask 34-48-00-740-060-C 4. Fault Isolation
Subtask 34-48-00-810-056-A
A. If the BITE test gives the maintenance message ADIRU1 (1FP1)/GPWC (1WZ):
Subtask 34-48-00-740-061-A - replace the GPWC [1WZ] AMM 34-48-34-000-001 and AMM 34-48-34-400-001.
- do a check and repair the
wiring of the AIR DATA INPUT bus from the GPWC (1WZ) to the first terminal block ASM 344801.
B. Do the test given in Para. 3.