DOC AIRBUS | AMM A320FInspection After a MLG Towing Overload or Overrun with a Power Push Unit
TASK 05-51-22-200-802-A
Inspection After a MLG Towing Overload or Overrun with a Power Push Unit
This inspection is necessary if the power push unit causes an unwanted movement of the Main Landing Gear (MLG). This causes loads on the MLG shock absorber, the torque link assembly, the wheels, the tires, the brakes and the hydraulic and electrical connectors.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 05-51-22-481-051-A
Subtask 05-51-22-210-054-A
Subtask 05-51-22-410-051-A
[Rev.10 from 2021]
2026.03.31 22:51:38 UTC
Inspection After a MLG Towing Overload or Overrun with a Power Push Unit
WARNING:
MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR AND DOORS. MOVEMENT OF THE LANDING GEAR AND DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.
1. Reason for the JobThis inspection is necessary if the power push unit causes an unwanted movement of the Main Landing Gear (MLG). This causes loads on the MLG shock absorber, the torque link assembly, the wheels, the tires, the brakes and the hydraulic and electrical connectors.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | CHOCK - WHEEL(S) |
| No specific | AR | SAFETY BARRIER(S) |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 05-51-22-200-001-A | Inspection After a NLG Towing Overload or Overrun |
| TASK 07-12-00-582-001-A | Jacking of the Nose Landing Gear |
| TASK 10-11-00-555-015-A | Procedure for the Installation of Wheel Chocks on Aircraft |
| TASK 12-14-32-200-001-A | Inspection of the MLG Shock Absorbers before Flight |
| TASK 32-00-00-081-001-A | Removal of the Safety Devices from the Landing Gears |
| TASK 32-00-00-081-002-A | Removal of the Safety Devices from the Landing Gear Doors |
| TASK 32-00-00-481-001-A | Installation of the Safety Devices on the Landing Gears |
| TASK 32-00-00-481-002-A | Installation of the Safety Devices on the Landing Gear Doors |
| TASK 32-11-12-000-001-A | Removal of the MLG Hydraulic Dressings |
| TASK 32-11-12-400-001-A | Installation of the MLG Hydraulic Dressings |
| TASK 32-11-43-000-001-A | Removal of the 1M and 2M Harnesses from the MLG Leg |
| TASK 32-11-43-400-002-A | Installation of the 1M and 2M Harnesses on the MLG Leg |
| TASK 32-12-00-010-001-A | Open the Main Gear Doors for Access |
| TASK 32-12-00-410-001-A | Close the Main Gear Doors after Access |
| TASK 32-40-00-200-001-A | Inspection/Check of Brake System |
| TASK 32-41-00-210-002-A | Inspection/Check of the Wheels and Tires |
| TASK 32-41-11-000-006-A | Removal of the MLG Wheel |
| TASK 32-41-11-400-006-A | Installation of the MLG Wheel |
| TASK 32-41-12-000-001-A | Removal of the NLG Wheel |
| TASK 32-41-12-000-002-A | Removal of the Axle Sleeve |
| TASK 32-41-12-400-001-A | Installation of the NLG Wheel |
| TASK 32-41-12-400-002-A | Installation of the Axle Sleeve |
| TASK 32-42-27-000-001-A | Removal of the Brake |
| TASK 32-42-27-400-001-A | Installation of the Brake |
| TASK 32-42-71-000-001-A | Removal of the MLG Axle Adaptor-Sleeves |
| TASK 32-42-71-400-001-A | Installation of the MLG Axle Adaptor-Sleeves |
| TASK 32-48-51-000-005-A | Removal of the Fan Assy |
| TASK 32-48-51-400-005-A | Installation of the Fan Assy |
| TASK 32-51-00-720-003-A | Functional Test of the Nose Wheel Steering with the Handwheel |
MLG Inspection PointsSubtask 05-51-22-481-051-A
A. Safety Precautions
(1) On panel 110VU, make sure that the PARK BRK control-switch is ON.
(2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(3) Make sure that the safety devices are installed on the landing gears (Ref. AMM TASK 32-00-00-481-001).
Subtask 05-51-22-860-050-A (1) On panel 110VU, make sure that the PARK BRK control-switch is ON.
(2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(3) Make sure that the safety devices are installed on the landing gears (Ref. AMM TASK 32-00-00-481-001).
B. Aircraft Maintenance Configuration
(1) Put the CHOCK - WHEEL(S) in position in front of and behind:
(3) Move the power push unit away from the MLG.
(4) Open the MLG doors (Ref. AMM TASK 32-12-00-010-001).
(5) Install the safety devices on the MLG doors (Ref. AMM TASK 32-00-00-481-002).
(6) Put the WARNING NOTICE(S) in position to tell persons not to:
4. Procedure(1) Put the CHOCK - WHEEL(S) in position in front of and behind:
- The Nose Landing Gear (NLG) wheels and
- The MLG wheels, opposite the damaged side of the MLG.
(3) Move the power push unit away from the MLG.
(4) Open the MLG doors (Ref. AMM TASK 32-12-00-010-001).
(5) Install the safety devices on the MLG doors (Ref. AMM TASK 32-00-00-481-002).
(6) Put the WARNING NOTICE(S) in position to tell persons not to:
- Close the MLG doors
- Set the PARK BRK control-switch to ON.
Subtask 05-51-22-210-054-A
A. Inspection of the MLG
Subtask 05-51-22-210-055-A | ITEM | INSP CODE | INSPECTION TASKS | PHASE 1 | PHASE 2 | PHASE 3 | INSP SIGN | REF. FIG. |
|---|---|---|---|---|---|---|---|
| 1. | | Measure dimension "H" on the MLG shock absorber (Ref. AMM TASK 12-14-32-200-001). | X | | | | |
| 2. | | MLG Visual Inspection | | | | | |
| A. | | Do a visual inspection of the shock absorber for:
| X | | | | |
| B. | | Do a visual inspection of the torque link damper for:
| X | | | | |
| C. | | Do a visual inspection of the torque links for:
| X | | | | |
| D. | | Do a visual inspection of the torque-link apex pin and nut for:
| X | | | | |
| E. | | Do a visual inspection of the upper and lower gear-attachment hinge-joints of the torque links for:
| X | | | | |
| F. | | Do a visual inspection of the slave links for:
| X | | | | |
| G. | | Do a visual inspection of the slave-link gear-attachment joints and hinge point for:
| X | | | | |
| | | If you find damage:
| | X | | | |
| 3. | | Hydraulic Dressings | | | | | |
| A. | | From the level of the side-stay attachment joint to the axle, do a visual inspection for:
the MLG leg (or other pipes). Make sure that the pipe and hose band clamps, clamp blocks and brackets are correctly installed. | X | | | | |
| B. | | Do a visual inspection of the hydraulic brake hoses for:
| X | | | | |
| | | If you find damage:
| | X | | | |
| 4. | | Electrical Harnesses 1M and 2M | | | | | |
| A. | | From the level of the side-stay attachment joint to the axle, do a visual inspection of the electrical harnesses and the related connectors for:
| X | | | | |
| | | If you find damage:
| | X | | | |
| 5. | | Wheels and Tires | | | | | |
| A. | | Do a visual inspection of the wheels and tires for:
| X | | | | |
| | | If you find damage:
| | X | | | |
| B. | | Do a visual inspection of the axle (without removal of the wheels) for:
| X | | | | |
| | | If you find damage:
| | X | | | |
| 6. | | Brakes | | | | | |
| A. | | Do a visual inspection of the brakes for:
| X | | | | |
| | | If you find damage:
| | X | | | |
| 7. | | Brake Fans (if installed) | | | | | |
| A. | | Do a visual inspection of the brake fans for:
| X | | | | |
| | | If you find damage:
| | X | | | |
B. NLG Inspection after NLG Slipping
Do this inspection only if there was slipping of the NLG on the taxiway because of MLG towing overload or overrun with the power push unit.
5. Close-upDo this inspection only if there was slipping of the NLG on the taxiway because of MLG towing overload or overrun with the power push unit.
NOTE: This inspection is not necessary if there was no NLG slipping.
| ITEM | INSP CODE | INSPECTION TASKS | PHASE 1 | PHASE 2 | PHASE 3 | INSP SIGN | REF. FIG. |
|---|---|---|---|---|---|---|---|
| 1. | | If there was no obstacle when the NLG moved: | | | | | |
| | | A. Lift the nose gear wheel for nose-gear wheel change (Ref. AMM TASK 07-12-00-582-001). | X | | | | |
| | | B. Do a visual inspection of the wheels and tires for damage and deformation (Ref. AMM TASK 32-41-00-210-002). Examine the full circumference of the tires. | X | | | | |
| | | If you find damage: (1) Remove the NLG wheels (Ref. AMM TASK 32-41-12-000-001). | | X | | | |
| | | (2) Remove the wheel axle sleeve (Ref. AMM TASK 32-41-12-000-002) and make sure that it slides and rotates freely. | | X | | | |
| | | If you find damage:
| | | X | | |
| | | (3) Examine the wheel axle for discoloration or impact. | | X | | | |
| | | If you find damage:
| | | X | | |
| | | (4) Install the wheel axle sleeve (Ref. AMM TASK 32-41-12-400-002). | | X | | | |
| | | (5) Install the NLG wheels (Ref. AMM TASK 32-41-12-400-001). | | X | | | |
| | | C. Do a functional test of the nosewheel steering system (Ref. AMM TASK 32-51-00-720-003). | X | | | | |
| | | If you find damage:
| | X | | | |
| | | D. Lower the nose gear onto its wheels (Ref. AMM TASK 07-12-00-582-001). | X | | | | |
| 2. | | If there was an obstacle when the NLG moved, contact Airbus. | X | | | | |
Subtask 05-51-22-410-051-A
A. Close Access
(1) Remove the safety devices from the landing gears and the MLG doors (Ref. AMM TASK 32-00-00-081-001) and (Ref. AMM TASK 32-00-00-081-002).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).
(4) On panel 110VU, set the PARK BRK control-switch to ON.
(5) Remove the WARNING NOTICE(S).
(6) Put the CHOCK - WHEEL(S) in position (Ref. AMM TASK 10-11-00-555-015).
(7) Remove the SAFETY BARRIER(S).
(1) Remove the safety devices from the landing gears and the MLG doors (Ref. AMM TASK 32-00-00-081-001) and (Ref. AMM TASK 32-00-00-081-002).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).
(4) On panel 110VU, set the PARK BRK control-switch to ON.
(5) Remove the WARNING NOTICE(S).
(6) Put the CHOCK - WHEEL(S) in position (Ref. AMM TASK 10-11-00-555-015).
(7) Remove the SAFETY BARRIER(S).