Failure of the Compressor Vanes on Engine 1

TASK 73-10-00-810-803-A
Failure of the Compressor Vanes on Engine 1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 73-21-10-000-001	Removal of the Hydromechanical Unit (HMU)
AMM 73-21-10-400-001	Installation of the Hydromechanical Unit (HMU)
AMM 73-29-00-710-040	Operational Test of the FADEC on the ground (with Engine Motoring)

3. Fault Confirmation
Subtask 73-10-00-710-054-A ** ON A/C NOT FOR ALL

A. Do the operational test of the FADEC 1A on the ground (with engine motoring) AMM 73-29-00-710-040.

4. Fault Isolation
Subtask 73-10-00-810-052-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message HMU:

[Rev.8 from Aug 2018] 2026.04.04 04:35:13 UTC