DOC AIRBUS | TSM A320FLGCIU System ID Inconsistent With Proximity Sensors
TASK 32-31-00-810-894-A
LGCIU System ID Inconsistent With Proximity Sensors
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 32-31-00-710-083-A ** ON A/C NOT FOR ALL
Subtask 32-31-00-810-156-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:31:27 UTC
LGCIU System ID Inconsistent With Proximity Sensors
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AWM 315446 | |
| AWM 323102 | |
| AMM 32-31-71-000-001 | Removal of the LGCIU |
| AMM 32-31-71-400-001 | Installation of the LGCIU |
| 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 |
Subtask 32-31-00-710-083-A ** ON A/C NOT FOR ALL
A. Test
(1) Do a BITE test of the LGCIU that shows the fault, AMM 32-69-00-740-001:
(a) If the message WRG: AA9K/LGCIU1(5GA1) is shown, do the fault isolation in Para. 4. A. (1).
(b) If the message WRG: AA9K/LGCIU2(5GA2) is shown, do the fault isolation in Para. 4. A. (3).
4. Fault Isolation(1) Do a BITE test of the LGCIU that shows the fault, AMM 32-69-00-740-001:
(a) If the message WRG: AA9K/LGCIU1(5GA1) is shown, do the fault isolation in Para. 4. A. (1).
(b) If the message WRG: AA9K/LGCIU2(5GA2) is shown, do the fault isolation in Para. 4. A. (3).
Subtask 32-31-00-810-156-A ** ON A/C NOT FOR ALL
A. Procedure
(1) Do a check of the aircraft wiring and ARINC tray for LGCIU-1, make sure that:
(2) If the fault continues:
(a) Replace the LGCIU-1 [5GA1] , AMM 32-31-71-000-001 and AMM 32-31-71-400-001.
(3) Do a check of the aircraft wiring and ARINC tray for LGCIU-2, make sure that:
(4) If the fault continues:
(a) Replace the LGCIU-2 [5GA2] , AMM 32-31-71-000-001 and AMM 32-31-71-400-001.
(1) Do a check of the aircraft wiring and ARINC tray for LGCIU-1, make sure that:
- LGCIU-1 pin AA9K is not connected to the aircraft wiring
- LGCIU-1 pins AA6C, AA6D, AA6E and AA6F are connected to the aircraft wiring, AWM 315446
- LGCIU-1 pins AA6G, AA6H, AA6J and AA6K are connected to the aircraft wiring, AWM 315446.
- All the electrical connections to the LGCIU-1 are correct, Ref ASM 32-31.
- There is no unwanted matreial that could cause a short beween the electrical connections on the LGCIU-1.
(2) If the fault continues:
(a) Replace the LGCIU-1 [5GA1] , AMM 32-31-71-000-001 and AMM 32-31-71-400-001.
(3) Do a check of the aircraft wiring and ARINC tray for LGCIU-2, make sure that:
- LGCIU-2 pin AA9K is connected to the aircraft wiring, and to ground AWM 323102
- LGCIU-2 pins AA6C, AA6D, AA6E and AA6F are connected to the aircraft wiring, AWM 315446
- LGCIU-2 pins AA6G, AA6H, AA6J and AA6K are not connected to the aircraft wiring, AWM 315446
- All the electrical connections to the LGCIU-2 are correct, (Ref ASM 32-31)
- There is no unwanted material that could cause a short between the electrical connections on the LGCIU-2.
(4) If the fault continues:
(a) Replace the LGCIU-2 [5GA2] , AMM 32-31-71-000-001 and AMM 32-31-71-400-001.