LGCIU - The EFCS Does Not Receive Data from the LGCIU

TASK 32-31-00-810-881-A
LGCIU - The EFCS Does Not Receive Data from the LGCIU

1. Possible Causes

LGCIU-1 [5GA1]
LGCIU-2 [5GA2]
aircraft wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-60-00-860-001	EIS Start Procedure
ASM 323103
ASM 323104
AMM 32-31-71-000-001	Removal of the LGCIU
AMM 32-31-71-400-001	Installation of the LGCIU

3. Fault Confirmation
Subtask 32-31-00-710-072-A

A. Test
(1) Do the EIS Start Procedure (Upper and Lower ECAM DU only) AMM 31-60-00-860-001.
(2) At the ECAM Control Panel set the STS page.
(3) Look at the Status Page for the message LGCIU 1 (2).

if the message is shown, do the fault isolation procedure in Para. 4.A.
if the message is not shown, there is no LGCIU 1 (2) fault.

4. Fault Isolation
Subtask 32-31-00-810-139-A

A. Procedure
(1) Interchange LGCIU 1 with LGCIU 2, AMM 32-31-71-000-001 and AMM 32-31-71-400-001.
(2) Do the test in Para. 3.A:

if the fault stays in the initial system (identified in the failure message), do step (5)
if the fault moves to the opposite system, do the next step.

(3) Replace the unserviceable LGCIU-1 [5GA1] or LGCIU-2 [5GA2] .
(4) Make sure that the serviceable LGCIU is installed in its initial position.
(5) Do the test in Para. 3.A:

if the fault continues do the next step.

(6) Do a check and repair the aircraft wiring between the applicable LGCIU and its related 28 VDC power supply C/B, ASM 323103 or ASM 323104.
(7) Do the test in Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:31:26 UTC