Loss of the FCDC 2 BUS 4 Signal for the ELAC 1

TASK 27-93-00-810-913-A
Loss of the FCDC 2 BUS 4 Signal for the ELAC 1

1. Possible Causes

ELAC-1 [2CE1]
FCDC-2 [3CE2]
wiring of the DGI 12 signal from the ELAC 1 (2CE1) MON part to the FCDC 2(3CE2)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 27-93-34-000-001	Removal of the ELAC
AMM 27-93-34-400-001	Installation of the ELAC
ASM 279503
AMM 27-95-34-000-001	Removal of the FCDC
AMM 27-95-34-400-001	Installation of the FCDC
AMM 27-96-00-740-001	BITE Test of the EFCS (Ground Scanning)

3. Fault Confirmation
Subtask 27-93-00-740-154-A

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

4. Fault Isolation
Subtask 27-93-00-810-151-A

A. If the BITE test gives the maintenance message:
ELAC1-MON OR BUS 4 FROM FCDC2
(1) Replace the ELAC-1 [2CE1] AMM 27-93-34-000-001 and AMM 27-93-34-400-001.
(2) If the fault continues:

Replace the FCDC-2 [3CE2] AMM 27-95-34-000-001 and AMM 27-95-34-400-001.

(3) If the fault continues:

Do a check and repair the wiring of the DGI 12 signal from the ELAC 1 (2CE1) MON part to the FCDC 2(3CE2) ASM 279503.

Subtask 27-93-00-740-155-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:28:05 UTC