DOC AIRBUS | TSM A320FFailure of the Accelerometer (4004EVA) Circuit on Engine 1
1. Possible Causes
· TRANSDUCER-VIBRATION ( 4004EV1 )
· CABLE ASSY-VIBRATION TRANSDUCER 1 ( 4004EV2 )
· wiring from the pins AA/2B, 1A of the EVMU (2EV) to the pins 2, 3 of the connector 448VC1A
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 77-32-00-200-010 General Check of the Engine Vibration Indicating System
Ref. AWM 77-32-03
Ref. AMM 77-32-15-000-010 Removal of the Vibration Transducer
Ref. AMM 77-32-15-400-010 Installation of the Vibration Transducer
Ref. AMM 77-32-34-710-041 Operational Check of EVMU through CFDS
Ref. AMM 77-32-34-869-047 Configuration of the Accelerometer
Ref. AMM 77-32-43-000-010 Removal of the Vibration Harness
Ref. AMM 77-32-43-400-010 Installation of the Vibration Harness
Accelerometer (Engine 1) SHEET 1
Figure 77(IAE)-32-00-991-00100-A / SHEET 1/1 - Accelerometer (Engine 1) not printed, as per printing
preferences
3. Fault Confirmation
Subtask 77-32-00-710-052-A
A. Do the operational test of the Engine Vibration Monitoring Unit (EVMU) through the Centralized Fault
Display System (CFDS) Ref. AMM 77-32-34-710-041 .
4. Fault Isolation
(Ref. Fig. Accelerometer (Engine 1) SHEET 1)
Subtask 77-32-00-810-051-A
A. If the operational test gives the maintenance message ENG1 ACCLRM 4004EVA:
· reconfigure the accelerometer from the MCDU to get the data from the engine 1 accelerometer B Ref.
AMM 77-32-34-869-047 .
(1) During the selection, if the EVMU rejects the request and transmits the failure message ENG 1
ACCLRM 4004EVB DEFECT:
· Do an inspection of the vibration indicating system Ref. AMM 77-32-00-200-010 .
(a) If the fault continues:
· replace the TRANSDUCER-VIBRATION ( 4004EV1 ) , Ref. AMM 77-32-15-000-010 and Ref.
AMM 77-32-15-400-010 .
(2) During the selection, if the EVMU accepts the request and transmits no failure message:
· at the subsequent shop visit, replace the CABLE ASSY-VIBRATION TRANSDUCER
1 ( 4004EV2 ) , Ref. AMM 77-32-43-000-010 and Ref. AMM 77-32-43-400-010 .
(a) If the fault continues:
· do a check and repair the wiring from the pins AA/2B, 1A of the EVMU (2EV) to the pins 2, 3
of the connector 448VC1A , Ref. AWM 77-32-03.
Subtask 77-32-00-710-053-A
B. Do the test given in Para. 3. [Rev.6 from Feb 2017] 2026.04.04 04:37:53 UTC