DOC AIRBUS | TSM A320FFailure of the No. 1 Bearing Vibration Sensor on Engine 2
TASK 77-30-00-810-810-A
Failure of the No. 1 Bearing Vibration Sensor on Engine 2
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 77-30-00-710-065-A ** ON A/C NOT FOR ALL
Subtask 77-30-00-810-058-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:37:47 UTC
Failure of the No. 1 Bearing Vibration Sensor on Engine 2
1. Possible Causes
wiring from the EVMU (2EV) to the vibration sensor (4002EV) - EVMU [2EV]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ASM 773202 | |
| AMM 77-32-34-000-040 | Removal of the Monitoring Unit Engine Vibration (EVMU) |
| AMM 77-32-34-000-042 | Removal of the Engine Vibration Monitoring Unit (EVMU) |
| AMM 77-32-34-400-040 | Installation of the Vibration Monitoring Unit (EVMU) |
| AMM 77-32-34-400-042 | Installation of the Engine Vibration Monitoring Unit (EVMU) |
| AMM 77-32-34-710-040 | Operational Check of EVMU through CFDS for Advisory Indication on ECAM |
| AMM 77-32-34-860-041 | Change the configuration of the Accelerometer |
| AMM 77-32-34-869-041 | Change the configuration of the Accelerometer |
Subtask 77-30-00-710-065-A ** ON A/C NOT FOR ALL
A. Test
(1) Do the operational test of the Engine Vibration Monitoring Unit (EVMU) through the Centralized Fault Display System (CFDS) AMM 77-32-34-710-040.
4. Fault Isolation(1) Do the operational test of the Engine Vibration Monitoring Unit (EVMU) through the Centralized Fault Display System (CFDS) AMM 77-32-34-710-040.
Subtask 77-30-00-810-058-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message ENG2 BRG1 ACCEL:
Subtask 77-30-00-810-058-B ** ON A/C NOT FOR ALL - do a check of the
wiring from the EVMU (2EV) to the vibration sensor (4002EV) pins AA/1A, 2B to pins AA/2, 3 ASM 773202.
- repair the above wiring.
- reconfigure the accelerometer to get the data from the TRF vibration sensor AMM 77-32-34-869-041.
NOTE: The No. 1 bearing vibration sensor is not a LRU, replace it at the first shop visit.
(3) If the fault continues: - replace the EVMU [2EV] , AMM 77-32-34-000-040 and AMM 77-32-34-400-040.
A. If the test gives the maintenance message ENG2 BRG1 ACCEL:
Subtask 77-30-00-710-066-A ** ON A/C NOT FOR ALL - do a check of the
wiring from the EVMU (2EV) to the vibration sensor (4002EV) pins AA/1A, 2B to pins AA/2, 3 ASM 773202.
- repair the above wiring.
- reconfigure the accelerometer to get the data from the TRF vibration sensor AMM 77-32-34-860-041.
NOTE: The No. 1 bearing vibration sensor is not a LRU, replace it at the first shop visit.
(3) If the fault continues: - replace the EVMU [2EV] , AMM 77-32-34-000-042 and AMM 77-32-34-400-042.
B. Do the test given in Para. 3.A.