DOC AIRBUS | TSM A320FLoss of the LLG/GND2 Signal
TASK 32-42-00-810-852-A
Loss of the LLG/GND2 Signal
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 32-42-00-740-108-A
Subtask 32-42-00-810-109-B
[Rev.8 from Aug 2018]
2026.04.04 04:31:34 UTC
Loss of the LLG/GND2 Signal
1. Possible Causes
- PROX SNSR-L L/G EXT, SYS 2 [23GA]
- LGCIU-2 [5GA2]
- BSCU [10GG]
wiring from the BSCU (10GG) to the LGCIU2
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 32-42-00-740-108-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 32-42-00-810-109-B
A. If the test gives the maintenance message LGCIU2 L SHOCK ABSORB SIGNAL/BSCU(10GG)
(2) If there is no ground signal:
Subtask 32-42-00-740-109-A - do a check for a ground signal at pin A/13D of the BSCU ASM 324202.
(2) If there is no ground signal:
- replace the PROX SNSR-L L/G EXT, SYS 2 [23GA] AMM 32-31-73-000-001 AMM 32-31-73-400-001.
- replace the LGCIU-2 [5GA2] 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 LGCIU2 pin A/13D to pin AB/4F ASM 324202.
B. Do the test given in Para.3.A