Loss of the BUS 2 Signal of the ELAC 1 detected by FCDCs

TASK 27-93-00-810-905-A
Loss of the BUS 2 Signal of the ELAC 1 detected by FCDCs

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 31-32-00-810-934-A	Failure of the Digital Links
ASM 279250
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 27-93-00-740-138-A

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

4. Fault Isolation
Subtask 27-93-00-810-143-A

A. If the BITE test gives the maintenance message:
ELAC1 COM BUS2
or
ELAC1 MON BUS2

(1) If the fault continues:

do the trouble shooting procedure (Ref. TSM TASK 31-32-00-810-934) to the DGO 02 digital output signal of the ELAC 1 COM and MON ASM 279250.

(2) If the fault continues:

do a check and repair the wiring of the DGO 02 signal from the ELAC 1 (2CE1) to the first terminal block, COM or MON part as shown in the maintenance message ASM 279250.

Subtask 27-93-00-740-139-A

B. Do the test given in Para. 3.

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