Loss of all Identification Connector Data

TASK 73-20-00-810-973-A
Loss of all Identification Connector Data

1. Possible Causes

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 73-21-90-000-002	Removal of the Engine Identification Connector
AMM 73-21-90-400-002	Installation of the Engine Identification Connector
AMM 73-29-00-710-040	Operational Test of the FADEC on the ground (with Engine Motoring)

3. Fault Confirmation
Subtask 73-20-00-710-318-A ** ON A/C NOT FOR ALL

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

4. Fault Isolation
Subtask 73-20-00-810-276-C ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message J14 (ID FAULT), ECU:

(1) If an ID plug is not installed:

(2) If an ID plug is installed:

NOTE: The ID plug can be checked on the MCDU screen. Access reporting functions, then select the LRU Identification screen.

Line 1 of the LRU Identification screen shows the engine model designation as "CFM56-5BX/ZZZ".

(a) If the ID plug is invalid:

(b) If the ID plug is valid:

remove, clean, and reinstall the ID plug AMM 73-21-90-000-002 and AMM 73-21-90-400-002
If the fault continues, replace the ID plug AMM 73-21-90-000-002 and AMM 73-21-90-400-002.

(3) If the fault continues:

Subtask 73-20-00-710-319-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:35:31 UTC