Loss of the Vibration Level Indications on Engine 2

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1. Possible Causes
· EVMU ( 2EV )
· wiring from the circuit breaker 1EV to the EVMU (2EV)
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power
Ref. AMM 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External
Power
Ref. AMM 31-60-00-860-001 EIS Start Procedure
Ref. AMM 31-60-00-860-002 EIS Stop Procedure
Ref. AMM 70-23-15-912-010 Connection of Electrical Connectors
Ref. ASM 77-32-02
Ref. AMM 77-32-34-000-041 Removal of the Engine Vibration Monitoring Unit (EVMU)
Ref. AMM 77-32-34-400-041 Installation of the Engine Vibration Monitoring Unit (EVMU)
3. Fault Confirmation
Subtask 77-30-00-860-056-A
A. Job Set-up
(1) Energize the aircraft electrical circuits
Ref. AMM 24-41-00-861-002 .
(2) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
Ref. AMM 31-60-00-860-001 .
Subtask 77-30-00-710-100-A
B. Test
(1) On the ECAM control panel:
· push the ENG key to get the ENGINE page on the lower ECAM display unit.
(2) On the ENGINE page, see if the VIB (N1) and the VIB (N2) indications for the engine 2 are replaced
by the amber crosses.
4. Fault Isolation
Subtask 77-30-00-810-080-A
A. If the VIB (N1) and the VIB (N2) indications for the engine 2 are not replaced by amber crosses:
· no other maintenance action is necessary.
Subtask 77-30-00-810-081-A
B. If the VIB (N1) and the VIB (N2) indications for the engine 2 are replaced by amber crosses:
· disconnect the connector (2EV-AC) from the EVMU (2EV)
· at the electrical connector (2EV-AC), do a check for 115VAC between pins 2 and 4.
(1) If there is 115VAC:
· replace the EVMU ( 2EV ) Ref. AMM 77-32-34-000-041 and Ref. AMM 77-32-34-400-041 .
(2) If there is no 115VAC:
· do a check and repair the wiring from the circuit breaker 1EV to the EVMU (2EV) : pin 2 to pin
AC/2 Ref. ASM 77-32-02.
(3) Connect the electrical connector (2EV-AC) to the EVMU (2EV) Ref. AMM 70-23-15-912-010 .
Subtask 77-30-00-710-104-A
C. Do the test given in Para. 3.
5. Close-up
Subtask 77-30-00-860-057-A
A. Put the aircraft back to its initial configuration.
(1) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
Ref. AMM 31-60-00-860-002 .
(2) De-energize the aircraft electrical circuits
Ref. AMM 24-41-00-862-002 . [Rev.6 from Feb 2017] 2026.04.04 04:37:52 UTC