Loss of N1 or N2 Vibration Indication on One Engine

TASK 77-30-00-810-802-A
Loss of N1 or N2 Vibration Indication on One Engine

1. Possible Causes

EVMU [2EV]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
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

3. Fault Confirmation
Subtask 77-30-00-710-052-A ** ON A/C NOT FOR ALL

A. Test
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
Subtask 77-30-00-810-051-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message EVMU:

replace the EVMU [2EV] , AMM 77-32-34-000-040 and AMM 77-32-34-400-040.

Subtask 77-30-00-810-051-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message EVMU:

replace the EVMU [2EV] , AMM 77-32-34-000-042 and AMM 77-32-34-400-042.

[Rev.8 from Aug 2018] 2026.04.04 04:37:47 UTC