Internal Failure of the ECU on Engine 2

TASK 73-20-00-810-890-A
Internal Failure of the ECU on Engine 2

1. Possible Causes

ECU [4000KS]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 73-21-60-000-001	Removal of the Electronic Control Unit (ECU)
AMM 73-21-60-400-001	Installation of the Electronic Control Unit (ECU)
AMM 73-29-00-710-040	Operational Test of the FADEC on the ground (with Engine Motoring)

3. Fault Confirmation
Subtask 73-20-00-710-179-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the operational test of the FADEC 2A on the ground (with engine non motoring) AMM 73-29-00-710-040.
(2) Read the TROUBLE SHOOTING DATA of the FADEC MENU on the MCDU (Ref. 70-00-00, P. Block 301).

4. Fault Isolation
Subtask 73-20-00-810-142-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message ECU and the TROUBLE SHOOTING DATA gives the complementary information P0 PRESSURE:

make sure that the P0 nipple on the ECU is clear and not clogged.

(1) If the fault continues:

replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.

[Rev.8 from Aug 2018] 2026.04.04 04:35:24 UTC