Loss of the IR 1 BUS 2 for the ELAC 2

TASK 27-93-00-810-853-A
Loss of the IR 1 BUS 2 for the ELAC 2

1. Possible Causes

ELAC-2 [2CE2]
wiring of the DGI 03 signal from the ELAC 2 (2CE2) to the first terminal block

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 27-93-00-740-100-A ** ON A/C NOT FOR ALL

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

Subtask 27-93-00-740-100-B ** ON A/C NOT FOR ALL

A. Test
(1) Do a check of the Post Flight Report (PFR)
If the ELAC2-COM OR BUS 2 FROM IR1 maintenance message is shown in flight phase 08 (PH08):
(a) On the overhead panel, on the FLT CTL panel 24VU: release, then push the FLT CTL/ELAC2 pushbutton switch.
(b) Make an entry in the logbook to monitor the aircraft during the subsequent flight.
(c) During the subsequent flight:

If the fault occurs again, continue the trouble shooting procedure.

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

4. Fault Isolation
Subtask 27-93-00-810-102-A

A. If the BITE test gives the maintenance message:
ELAC2 COM OR BUS2 FROM IR1

replace the ELAC-2 [2CE2] AMM 27-93-34-000-001 and AMM 27-93-34-400-001.

(1) If the fault continues:

do a check and repair the wiring of the DGI 03 signal from the ELAC 2 (2CE2) to the first terminal block, COM part only ASM 279252.

Subtask 27-93-00-740-101-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:27:58 UTC