Loss of the FMGC 1 Bus for the ELAC 2

TASK 27-93-00-810-889-A
Loss of the FMGC 1 Bus for the ELAC 2

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 279252
AMM 27-93-34-000-001	Removal of the ELAC
AMM 27-93-34-400-001	Installation of the ELAC
AMM 27-96-00-740-001	BITE Test of the EFCS (Ground Scanning)

3. Fault Confirmation
Subtask 27-93-00-740-120-A

A. Test
(1) Do the BITE test of the EFCS (ground scanning) AMM 27-96-00-740-001.

4. Fault Isolation
Subtask 27-93-00-810-134-A

A. If the BITE test gives the maintenance message:
ELAC2 COM OR BUS FROM FMGC1
or
ELAC2 MON OR BUS FROM FMGC1

(1) If the fault continues:

do a check and repair the wiring of the DGI 04 signal from the ELAC 2 (2CE2) to the first terminal block, COM or MON part as shown in the maintenance message ASM 279252.

Subtask 27-93-00-740-121-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:28:01 UTC