Loss of the IR 3 BUS 3 for the ELAC 1

TASK 27-93-00-810-856-A
Loss of the IR 3 BUS 3 for the ELAC 1

1. Possible Causes

ELAC-1 [2CE1]
wiring of the DGI 03 signal from the ELAC 1 (2CE1) to the first terminal block

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
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 27-93-00-740-106-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 27-93-00-740-106-B ** ON A/C NOT FOR ALL

A. Test
(1) Do a check of the Post Flight Report (PFR)
If the ELAC1-COM OR BUS 3 FROM IR3 maintenance message is shown in flight phase 08 (PH08):
(a) On the overhead panel, on the FLT CTL panel 23VU: release, then push the FLT CTL/ELAC1 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 27-93-00-810-105-A

A. If the BITE test gives the maintenance message:
ELAC1 COM OR BUS3 FROM IR3

replace the ELAC-1 [2CE1] 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 1 (2CE1) to the first terminal block COM part only ASM 279250.

Subtask 27-93-00-740-107-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:27:59 UTC