Failure of the CFDIU Detected by the EIU 1

TASK 31-32-00-810-856-A
Failure of the CFDIU Detected by the EIU 1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 313204
AMM 31-32-34-000-001	Removal of the CFDIU
AMM 31-32-34-400-001	Installation of the CFDIU
AMM 73-25-34-710-040	Operational Test of the Engine Interface Unit

3. Fault Confirmation
Subtask 31-32-00-865-104-A

A. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R41

Subtask 31-32-00-710-052-A ** ON A/C NOT FOR ALL

B. Test
Do the operational test of the Engine Interface Unit (EIU 1) AMM 73-25-34-710-040.

4. Fault Isolation
Subtask 31-32-00-810-105-A

A. If the test gives the maintenance message EIU1 : NO DATA FROM CFDIU:

(1) If the fault continues:

do a check and repair the wiring from the CFDIU (1TW) pins AA/11F, 11G to the first terminal block ASM 313204.

Subtask 31-32-00-710-053-A

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

[Rev.8 from Aug 2018] 2026.04.04 04:29:52 UTC