DOC AIRBUS | TSM A320FLoss of the signals from the right tachometers to the BSCU
TASK 32-42-00-810-943-A
Loss of the signals from the right tachometers to the BSCU
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 32-42-00-720-084-A 4. Fault Isolation
Subtask 32-42-00-810-229-A
[Rev.8 from Aug 2018]
2026.04.04 04:31:39 UTC
Loss of the signals from the right tachometers to the BSCU
1. Possible Causes
wiring from the right tachometers to the BSCU (10GG) - BSCU [10GG]
- TACHOMETER-WHEEL 3 [20GG]
- TACHOMETER-WHEEL 4 [22GG]
- DRIVE ASSY-TACHOMETER,WHEEL 4 [2678GM]
- DRIVE ASSY-TACHOMETER,WHEEL 3 [2679GM]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 32-42-00-720-002 | Functional Test of the Tachometers and the Anti-Skid System with the Normal Braking System ON |
| AMM 32-42-34-000-001 | Removal of the Braking/Steering Control Unit (BSCU) |
| AMM 32-42-34-400-001 | Installation of the Braking/Steering Control Unit (BSCU) |
| AMM 32-42-57-000-001 | Removal of the Tachometer |
| AMM 32-42-57-400-001 | Installation of the Tachometer |
| AMM 32-42-68-000-003 | Removal of the MLG Tachometer-Drive |
| AMM 32-42-68-400-003 | Installation of the MLG Tachometer-Drive |
Subtask 32-42-00-720-084-A 4. Fault Isolation
Subtask 32-42-00-810-229-A
A. If the test confirms the fault:
Subtask 32-42-00-720-085-A - do a check and repair the
wiring from the right tachometers to the BSCU (10GG)
- replace the BSCU [10GG] AMM 32-42-34-000-001 AMM 32-42-34-400-001
- replace the TACHOMETER-WHEEL 3 [20GG] and TACHOMETER-WHEEL 4 [22GG] AMM 32-42-57-000-001 AMM 32-42-57-400-001
- replace the DRIVE ASSY-TACHOMETER,WHEEL 4 [2678GM] and DRIVE ASSY-TACHOMETER,WHEEL 3 [2679GM] AMM 32-42-68-000-003 AMM 32-42-68-400-003
B. Do the functional test given in Para.3.A.