EIU Signal Replaced

TASK 21-31-00-810-816-A
EIU Signal Replaced

1. Possible Causes

wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 213102
AMM 73-25-34-710-043	Operational Test of the Engine Interface Unit

3. Fault Confirmation
Subtask 21-31-00-710-080-A

A. Not applicable, you cannot confirm this fault on the ground.

NOTE: In the flight phases 4 and 5 the maintenance message EIU SIGNAL REPLACED shows that:

during the take-off at least one of the throttle levers was not set to take-off power >70%.

4. Fault Isolation
Subtask 21-31-00-810-108-A

A. If the CPC 1 (11HL) and/or CPC 2 (12HL) CLASS 3 FAULTS gives the maintenance messsage EIU SIGNAL REPLACED (17) caused in flight phase 7 or 8, no other maintenance action is necessary.

NOTE: The fault is caused by LDG 'bouncing' or by a hard landing.

Subtask 21-31-00-810-089-A

B. If the CPC 1 (11HL) CLASS 3 FAULTS gives the maintenance messsage EIU SIGNAL REPLACED (17) caused in flight phase other than 7 or 8 and,
the take off was performed with the minimum max. climb setting (throttle levers set at 70%):

do the operational test of the engine interface unit AMM 73-25-34-710-043.

(1) If the test gives a different maintenance message refer to the Fault Symptom List.
(2) If the fault continues:

do a check and repair the wiring between:
CPC 1 (11HL) AB/7D and EIU 1 (1KS1) AB/G1,
CPC 1 (11HL) AB/8D and EIU 2 (1KS2) AB/G1 ASM 213102.

Subtask 21-31-00-810-090-A

C. If the CPC 2 (12HL) CLASS 3 FAULTS gives the maintenance messsage EIU SIGNAL REPLACED (17) caused in flight phase other than 7 or 8:

do the operational test of the engine interface unit AMM 73-25-34-710-043.

(1) If the test gives a different maintenance message refer to the Fault Symptom List.
(2) If the fault continues:

do a check and repair the wiring between:
CPC 2 (12HL) AB/8D and EIU 2 (1KS2) AB/G1,
CPC 2 (12HL) AB/7D and EIU 1 (1KS2) AB/G1 ASM 213102.

Subtask 21-31-00-710-081-A

D. Do the test as given in the Para. 3.A.

5. Close-up
Subtask 21-31-00-860-065-A

A. Put the aircraft back to its initial configuration.

[Rev.8 from Aug 2018] 2026.04.04 04:24:42 UTC