DOC AIRBUS | TSM A320FNLG Does Not Uplock
TASK 32-31-00-810-865-A
NLG Does Not Uplock
A. Referenced Information
3. Fault Confirmation
Subtask 32-31-00-860-097-A
Subtask 32-31-00-810-123-A
[Rev.8 from Aug 2018]
2026.04.04 04:31:24 UTC
NLG Does Not Uplock
WARNING:
MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. MOVEMENT OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.
WARNING:
PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
1. Possible Causes- THE FLIGHT CONTROLS
- THE FLIGHT CONTROL SURFACES
- THE LANDING GEAR AND THE RELATED DOORS
- COMPONENTS THAT MOVE.
- UPLOCK ASSY-NLG [2530GM]
- Grease contamination of the NLG UPLOCK
- proximity sensors and targets
- nose landing gear
- NLG hinge bearing clearances
- ACTG CYL-NLG [2527GM]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 32-31-00-810-846-A | L/G Failure of one of the uplock proximity sensors 8GA thru 13GA |
| AMM 32-21-00-200-004 | Inspection/Check of the Clearance of the Nose-Gear Hinge Bearings |
| AMM 32-21-00-200-005 | Detailed Inspection/Check of the NLG |
| AMM 32-31-00-200-001 | Detailed Inspection of Gear Uplock and Door Uplock Units and Rollers |
| AMM 32-31-00-720-003 | Functional Test of the Normal Extension and Retraction of the Nose Landing Gear |
| AMM 32-31-21-000-001 | Removal of the NLG Uplock Assy |
| AMM 32-31-21-400-001 | Installation of the NLG Uplock Assy |
| AMM 32-31-22-000-001 | Removal of the NLG Actuating Cylinder |
| AMM 32-31-22-400-001 | Installation of the NLG Actuating Cylinder |
Subtask 32-31-00-860-097-A
A. Test
(1) Do a check of the PFR:
4. Fault Isolation(1) Do a check of the PFR:
- If there is a L/G NOT UPLOCKED indication, and CFDS TGT POS messages 12GA and 13GA are shown
or - If there is a NLG DOES NOT UPLOCK CFDS message shown:
Subtask 32-31-00-810-123-A
A. Procedure
(1) Do a check for grease contamination of the UPLOCK ASSY-NLG [2530GM] proximity sensors and targets.
(a) Remove grease that is not necessary.
(3) Do a check of the UPLOCK ASSY-NLG [2530GM] proximity sensors and targets (Ref. TSM TASK 32-31-00-810-846).
(4) If necessary for a defect found in Para. (2) or (3), replace the UPLOCK ASSY-NLG [2530GM] AMM 32-31-21-000-001 and AMM 32-31-21-400-001.
(5) Do the detailed inspection/check of the nose landing gear AMM 32-21-00-200-005.
(6) Do the inspection/check of the NLG hinge bearing clearances AMM 32-21-00-200-004.
(7) Repair the defects found in Para. (5) and (6).
(a) Do the functional test of the normal extension and retraction of the nose landing gear AMM 32-31-00-720-003.
(8) If the fault continues, the NLG is slow to operate or the fault continues after the subsequent flight, replace the ACTG CYL-NLG [2527GM] AMM 32-31-22-000-001 and AMM 32-31-22-400-001.
(1) Do a check for grease contamination of the UPLOCK ASSY-NLG [2530GM] proximity sensors and targets.
(a) Remove grease that is not necessary.
NOTE: Grease contamination of the NLG UPLOCK can cause incorrect indications.
(2) Do The Detailed Visual Inspection of the NLG Uplock AMM 32-31-00-200-001. (3) Do a check of the UPLOCK ASSY-NLG [2530GM] proximity sensors and targets (Ref. TSM TASK 32-31-00-810-846).
(4) If necessary for a defect found in Para. (2) or (3), replace the UPLOCK ASSY-NLG [2530GM] AMM 32-31-21-000-001 and AMM 32-31-21-400-001.
(5) Do the detailed inspection/check of the nose landing gear AMM 32-21-00-200-005.
(6) Do the inspection/check of the NLG hinge bearing clearances AMM 32-21-00-200-004.
(7) Repair the defects found in Para. (5) and (6).
(a) Do the functional test of the normal extension and retraction of the nose landing gear AMM 32-31-00-720-003.
(8) If the fault continues, the NLG is slow to operate or the fault continues after the subsequent flight, replace the ACTG CYL-NLG [2527GM] AMM 32-31-22-000-001 and AMM 32-31-22-400-001.