LGCIU Signal Mismatch

TASK 26-13-00-810-805-A
LGCIU Signal Mismatch

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 26-13-00-710-002	BITE Test of the APU Fire and Overheat Detection System
AMM 32-69-00-740-001	BITE Check of Landing-Gear Control Interface-Unit (LGCIU) With Use of MCDU to Ensure that Continuous BITE is Operative

3. Fault Confirmation
Subtask 26-13-00-710-058-A

A. Do the BITE test of the APU fire and overheat detection system AMM 26-13-00-710-002.

4. Fault Isolation
Subtask 26-13-00-810-067-A

A. If the test gives a different maintenance message:

Subtask 26-13-00-810-062-A

B. If the test gives the maintenance message CHECK FDU APU LGCIU INTFC:

(1) If the test gives a different maintenance message:

(2) If the fault continues:

do a check and repair the aircraft wiring if necessary between the:
FDU (13WG) connector A/D and LGCIU 1 (5GA1) connector AB/2B,
FDU (13WG) connector B/D and LGCIU 2 (5GA2) connector AB/2B.

Subtask 26-13-00-710-059-A

C. Do the test as given in the Para. 3.A.

5. Close-up
Subtask 26-13-00-860-054-A

A. Put the aircraft back to its initial configuration.

[Rev.8 from Aug 2018] 2026.04.04 04:27:17 UTC