DOC AIRBUS | TSM A320FL/G Fault Code H138 or H146 is Shown in LGCIU Trouble Shooting Data
TASK 32-31-00-810-850-A
L/G Fault Code H138 or H146 is Shown in LGCIU Trouble Shooting Data
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 32-31-00-740-080-A
Subtask 32-31-00-810-108-A
[Rev.8 from Aug 2018]
2026.04.04 04:31:23 UTC
L/G Fault Code H138 or H146 is Shown in LGCIU Trouble Shooting Data
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 31-32-00-860-009 | Procedure to Get Access to the SYSTEM REPORT/TEST/L/G Page |
| 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 32-31-00-740-080-A
A. Trouble Shooting Data
(1) At the MCDU, get access to the SYSTEM REPORT/TEST/ L/G page AMM 31-32-00-860-009.
(a) Push the TROUBLE SHOOTING DATA line key and go to the NEXT PAGE:
4. Fault Isolation(1) At the MCDU, get access to the SYSTEM REPORT/TEST/ L/G page AMM 31-32-00-860-009.
(a) Push the TROUBLE SHOOTING DATA line key and go to the NEXT PAGE:
- if the FAULT code H138 or H146 is shown for the first time, do the fault isolation procedure in Para. 4.A.(1)
- if the FAULT code H138 or H146 is shown and was also recorded after the previous flight, do the fault isolation procedure in Para. 4.A.(4).
NOTE: Fault codes H138 and H146 can be caused by a temporary timing error in the LGCIU. Because these timing errors can be intermittent, it is recommended that a record is kept of the Post Flight Report, the Trouble Shooting Data and the Serial Number. This record can then be attached to the LGCIU to help identify the fault.
Subtask 32-31-00-810-108-A
A. Procedure
(1) If this is the first time the fault code has been shown, do a BITE TEST of the LGCIU shown on the PFR AMM 32-69-00-740-001:
(a) If the LGCIU that gives the fault code is in the LGCIU-1 position, interchange it with LGCIU-2, AMM 32-31-71-000-001 and AMM 32-31-71-400-001.
(b) If the LGCIU that gives the fault code is in the LGCIU-2 position, keep it in System 2.
(4) If the same fault code has been recorded before, on the LGCIU with the same serial number, replace that unserviceable LGCIU-1 [5GA1] or LGCIU-2 [5GA2] , AMM 32-31-71-000-001 and AMM 32-31-71-400-001.
(1) If this is the first time the fault code has been shown, do a BITE TEST of the LGCIU shown on the PFR AMM 32-69-00-740-001:
- if the test is not OK, do the trouble shooting procedure related to the maintenance message.
- if the test is OK, do the next step.
(a) If the LGCIU that gives the fault code is in the LGCIU-1 position, interchange it with LGCIU-2, AMM 32-31-71-000-001 and AMM 32-31-71-400-001.
(b) If the LGCIU that gives the fault code is in the LGCIU-2 position, keep it in System 2.
NOTE: The LGCIU which is thought to be unserviceable can be used again on the next flight, if it is in the System 2 position.
(3) Make a record in the aircraft log to do a check for FAULT codes H138 and H146, after the subsequent flight. (4) If the same fault code has been recorded before, on the LGCIU with the same serial number, replace that unserviceable LGCIU-1 [5GA1] or LGCIU-2 [5GA2] , AMM 32-31-71-000-001 and AMM 32-31-71-400-001.