Inspection After a NLG Towing Overload or Overrun

TASK 05-51-22-200-001-A
Inspection After a NLG Towing Overload or Overrun

1. Reason for the Job
This inspection is necessary when:

Unwanted movements occurred after the towbar shear pin broke during towing, or
You do towbarless towing without Nose Landing Gear (NLG) steering disconnection, or
Overload is suspected on the NLG (for example, NLG can be overloaded during unexpected steering reconnection with towbarless tractor, towbar shear pin too strong, etc.).
This causes loads on the nose gear and its attachment structure.

NOTE: Overload can be detected by the overload-detection device of the towbarless tractor.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	WARNING NOTICE(S)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 07-11-00-581-001-A	Lifting for Aircraft Maintenance Operations
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 32-21-00-200-803-A	Special Detailed Inspection of the Torque-Link Center Hinge-Pin
TASK 32-21-11-000-003-A	Removal of the NLG Leg Assembly
TASK 32-21-27-000-002-A	Removal of the Torque-Link Center Hinge
TASK 32-21-27-400-002-A	Installation of the Torque-Link Center Hinge
TASK 32-22-00-010-001-A	Nose Gear Doors - Ground Doors Opening
TASK 32-22-00-410-001-A	Nose Gear Doors - Ground Doors Closing
TASK 32-31-00-720-003-A	Functional Test of the Normal Extension and Retraction of the Nose Landing Gear
TASK 32-51-42-000-001-C	Removal of the Nose-Wheel Steering Cylinder
TASK 32-51-42-000-001-C-01	Removal of the Nose-Wheel Steering Cylinder (EV NLG)
TASK 32-51-42-400-001-C	Installation of the Nose-Wheel Steering Cylinder
TASK 32-51-42-400-001-C-01	Installation of the Nose-Wheel Steering Cylinder (EV NLG)
NLG Well and NLG Components
Inspection of the NLG Steering System

3. Job Set-up
Subtask 05-51-22-941-051-A

A. Inspection Preparation and Requirements
(1) Always use the correct towbar shear pins.
(2) If the towing stops immediately after the failure of the towbar shear pin, the inspection is not necessary.
(3) Do an inspection of the nose landing gear only, after:

The failure of a towbar shear pin (during the forward or rearward towing) with subsequent separation and overrun of the towbar by the aircraft, or
Push-turn operations, when the towbar arm touches the tractor after a failure of the turning towbar shear pin only.

(4) Do the full inspection after:

Towing overload or overrun with incorrect towbar shear pins (too strong)
Towbarless towing without disconnection of the NLG steering (or after you connect the steering again).

Subtask 05-51-22-481-050-A

B. Safety Precautions
(1) Make sure that the safety devices are installed on the landing gears (Ref. AMM TASK 32-00-00-481-001).
(2) Put the WARNING NOTICE(S) in position to tell persons not to operate the nose landing gear.

Subtask 05-51-22-010-050-A

C. Get Access
(1) Open the nose gear doors (Ref. AMM TASK 32-22-00-010-001).
(2) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position.

4. Procedure
Subtask 05-51-22-210-051-A

A. Inspection of the Fuselage (FR9 to FR20)

NLG Well and NLG Components

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2
1.	Nose Landing-Gear Well (FR9 to FR20)
A.	Examine the attachment fittings of the drag strut assembly and the bearings. Make sure that there are no distortion, cracks or damaged paint.	X
B.	Examine the attachment fittings of the lock stay assembly. Make sure that there are no distortion, cracks or damaged paint.	X
C.	Examine the attach fittings of the nose-gear actuating cylinder. Make sure that there are no distortion, cracks, pulled or damaged fasteners or damaged paint.	X
D.	Examine the attach fittings and the side plates of the nose gear. Make sure that there are no distortion, cracks or damaged paint.	X
	If you find damage on item A. or B. or C. or D.: Contact Airbus for more instructions.		X
2.	Avionics Compartment
A.	Examine the gear well roof, the roof-to-sidewall joint and the attach fittings of the floor support strut. Make sure that there are no distortion, cracks, pulled or damaged fasteners or damaged paint.	X
	If you find damage: Contact Airbus for more instructions.		X

Subtask 05-51-22-210-052-A

CAUTION: FOR THE RACK TEETH INSPECTION, DO NOT TURN THE ROTATING TUBE TOO MUCH TO PREVENT RACK DISENGAGEMENT. THE RACK CYLINDER RE-INSTALLATION IS NOT AN EASY PROCEDURE.

B. Inspection of the NLG

NLG Well and NLG Components

Inspection of the NLG Steering System

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2
1.	NLG
A.	Examine: - The NLG and all the components installed on it for cracks, scores, tears, rupture, leakage or damaged paintwork. - The NLG drag-strut assembly for distortion, cracks or damaged paintwork.	X
	If you find damage: Contact Airbus for more instructions.		X
B.	Examine: - The shock absorber, the wheels, the tires and the torque link hinges. Make sure that there is no damage from the towbar or the towbarless tractor. If you tow with a towbar, examine the NLG tow fitting.	X
	If you find damage: Contact Airbus for more instructions.		X
C.	Examine the steering system:
	(1) Examine the steering actuator body for damaged paint and deformation. Make sure that there is/are no hydraulic leaks or distortion on the actuator end caps.	X
	If you find damage: Remove the NLG leg assembly (Ref. AMM TASK 32-21-11-000-003). Contact Airbus for more instructions.		X
	(2) Measure the diameters of the FWD and rear steering actuator bodies. Do the measurement at the ends of the steering actuator bodies. - Make sure that the diameters are not more than 88.3 mm (3.476 in.).	X
	If the diameters are more than 88.3 mm (3.476 in.): Remove the NLG leg assembly (Ref. AMM TASK 32-21-11-000-003). Contact Airbus for more instructions.		X
	(3) Remove the torque-link center hinge (Ref. AMM TASK 32-21-27-000-002).	X
	(4) Do a special detailed inspection of the torque-link center hinge-pin (Ref. AMM TASK 32-21-00-200-803).	X
	If you find damage: Contact Airbus for more instructions.		X
	(5) Manually move the upper torque link to turn the rotating tube. Make sure that the rotating tube turns freely.	X
	If you find damage: Contact Airbus for more instructions.		X
	(6) Remove the NLG steering actuator (Ref. AMM TASK 32-51-42-000-001):	X
	(a) Examine the steering piston seals, the cylinders and the piston attachment. Make sure that there is/are no cracks or damaged paint.	X
	(b) Manually move the upper torque link to turn the rotating tube and see the cylinder rack teeth. Do an inspection of the teeth for deformation damage. NOTE: To examine all the rack teeth, it is necessary to turn the rotating tube to one side and then the other side.	X
	(c) If you find damage: Remove the NLG leg assembly (Ref. AMM TASK 32-21-11-000-003). Contact Airbus for more instructions.		X
	(7) Install the torque-link center hinge (Ref. AMM TASK 32-21-27-400-002).	X
	(8) Install the NLG steering actuator (Ref. AMM TASK 32-51-42-400-001).	X

Subtask 05-51-22-410-050-A

C. Close Access
(1) Remove the WARNING NOTICE(S).
(2) Remove the access platform(s).
(3) Make sure that the work area is clean and clear of tools and other items.
(4) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).

Subtask 05-51-22-720-050-A

D. Test of the Nose Landing Gear

ITEM	INSP CODE	INSPECTION TASKS	PHASE 1	PHASE 2	PHASE 3	INSP SIGN	REF. FIG.
1.		Lift the aircraft with jacks (Ref. AMM TASK 07-11-00-581-001).
2.		Retract/extend the nose landing gear 3 times. Make sure that it moves smoothly. Make sure that the fittings and the structure do not prevent the movement of the parts that move (Ref. AMM TASK 32-31-00-720-003). NOTE: This check is necessary only if you found damage on the attachments of the landing gear or the adjacent structure.		X

[Rev.10 from 2021] 2026.03.31 22:51:37 UTC