Failure of the N2 Speed Condition Relay for Engine 2

TASK 73-25-00-810-860-A
Failure of the N2 Speed Condition Relay for Engine 2

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 291202
AMM 73-25-34-000-040	Removal of the Engine Interface Unit (EIU)
AMM 73-25-34-400-040	Installation of the Engine Interface Unit (EIU)
AMM 73-25-34-710-040	Operational Test of the Engine Interface Unit
AMM 73-25-34-710-043	Operational Test of the Engine Interface Unit

3. Fault Confirmation
Subtask 73-25-00-710-168-A ** ON A/C NOT FOR ALL

A. Do the operational test of the engine interface unit through the CFDS AMM 73-25-34-710-040.

Subtask 73-25-00-710-168-B ** ON A/C NOT FOR ALL

A. Do the operational test of the engine interface unit through the CFDS AMM 73-25-34-710-043.

4. Fault Isolation
Subtask 73-25-00-810-109-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message CHECK 2709GJ RELAY CIRCUIT OR EIU 2:

(1) If the fault continues:

(2) If the fault continues:

do a check and repair the wiring from the EIU-2 (1KS2) to the relay (2709GJ) pin AB/9E to pin Z.

Subtask 73-25-00-710-169-A ** ON A/C NOT FOR ALL

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

[Rev.8 from Aug 2018] 2026.04.04 04:35:43 UTC