DOC AIRBUS | TSM A320FLoss of the RLG/GND1 Signal
TASK 32-42-00-810-851-A
Loss of the RLG/GND1 Signal
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 32-42-00-740-106-A
Subtask 32-42-00-810-108-B
[Rev.8 from Aug 2018]
2026.04.04 04:31:34 UTC
Loss of the RLG/GND1 Signal
1. Possible Causes
- PROX SNSR-R L/G EXT, SYS 1 [20GA]
- LGCIU-1 [5GA1]
- BSCU [10GG]
wiring from the BSCU (10GG) to the LGCIU1 (5GA1)
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 32-42-00-810-839-A | No Braking of the Wheels during the Landing Gear Retraction |
| AMM 32-31-71-000-001 | Removal of the LGCIU |
| AMM 32-31-71-400-001 | Installation of the LGCIU |
| AMM 32-31-73-000-001 | Removal of the MLG Proximity-Sensors |
| AMM 32-31-73-400-001 | Installation of the MLG Proximity-Sensors |
| ASM 324202 | |
| AMM 32-42-34-000-001 | Removal of the Braking/Steering Control Unit (BSCU) |
| AMM 32-42-34-400-001 | Installation of the Braking/Steering Control Unit (BSCU) |
| AMM 32-46-00-740-001 | BITE Test of the BSCU |
Subtask 32-42-00-740-106-A
A. Test
(1) Do a reset of the BSCU with the A/SKID AND NOSE WHEEL switch (5GG).
(2) Do the BITE test of the BSCU AMM 32-46-00-740-001.
4. Fault Isolation(1) Do a reset of the BSCU with the A/SKID AND NOSE WHEEL switch (5GG).
(2) Do the BITE test of the BSCU AMM 32-46-00-740-001.
Subtask 32-42-00-810-108-B
A. If the test gives the maintenance message LGCIU1 (5GA1) RIGHT SHOCK ABSORB SIGNAL/BSCU(10GG):
(2) If there is no ground signal:
Subtask 32-42-00-740-107-A - do a check for a ground signal at pin A/12G of the BSCU ASM 324202.
(2) If there is no ground signal:
- replace the PROX SNSR-R L/G EXT, SYS 1 [20GA] AMM 32-31-73-000-001 AMM 32-31-73-400-001.
- replace the LGCIU-1 [5GA1] AMM 32-31-71-000-001 AMM 32-31-71-400-001.
- replace the BSCU [10GG] AMM 32-42-34-000-001 AMM 32-42-34-400-001.
- do a check and repair the
wiring from the BSCU (10GG) to the LGCIU1 (5GA1) pin A/12G to pin AB/2J ASM 324202.
B. Do the test given in Para. 3.A.