Loss of the Steering Control at Landing with the Wheels Turned 90 Degrees

TASK 32-51-00-810-835-A
Loss of the Steering Control at Landing with the Wheels Turned 90 Degrees

1. Possible Causes

Nose Wheel Steering electro-distributor
SERVO CTL-N/W STEERING [6GC]

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

REFERENCE	QTY	DESIGNATION
No specific	AR	PLATE 1.2 M (4 FT) - STEEL, SQUARED

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03HBD9)	Synthetic Ester base Grease-General Purpose Low Temp -

C. Referenced Information

REFERENCE	DESIGNATION
AMM 09-10-00-584-002	Towing by the Nose Landing Gear from the Front with a Towbar
AMM 24-41-00-861-002	Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002	De-energize the Aircraft Electrical Circuits Supplied from the External Power
AMM 29-10-00-863-001	Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart
AMM 29-10-00-864-001	Depressurize the Green Hydraulic System
AMM 32-51-51-000-001	Removal of the Nose-Wheel Steering Servo-Control
AMM 32-51-51-000-003	Removal of the Nose Wheel Steering Electro-Distributor
AMM 32-51-51-400-001	Installation of the Nose-Wheel Steering Servo-Control
AMM 32-51-51-400-003	Installation of the Nose Wheel Steering Electro-Distributor

3. Fault Confirmation
Subtask 32-51-00-860-052-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits AMM 24-41-00-861-002
(2) Pressurize the Green hydraulic system AMM 29-10-00-863-001
(3) On the nose gear leg on the N/W steering deactivation electrical box:

make sure that the towing lever is in the TOWING position (disengaged position)

NOTE: Two PLATE 1.2 M (4 FT) - STEEL, SQUARED are necessary.

(4) Put one of the steel plates in position in front of the nose wheels.
(5) Apply a thick layer of Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) to the top surface of the steel plate.
(6) Put the other steel plate on the top of the greased steel plate.
(7) Move the aircraft and put the nose wheels on the steel plates AMM 09-10-00-584-002

NOTE: Do not disconnect the tow bar from the aircraft.

Subtask 32-51-00-720-053-A

B. Do this test.
(1) With the tow bar, try to steer the nose wheels.

4. Fault Isolation
Subtask 32-51-00-810-097-A

A. If steering is not possible during the test:

replace the Nose Wheel Steering electro-distributor AMM 32-51-51-000-003 AMM 32-51-51-400-003.

(1) If fault continues:

replace the SERVO CTL-N/W STEERING [6GC] AMM 32-51-51-000-001 AMM 32-51-51-400-001.

Subtask 32-51-00-720-054-A

B. Do the test given in Para. 3.A.

5. Close-up
Subtask 32-51-00-860-053-A

A. Put the aircraft back to its initial configuration.
(1) Depressurize the Green hydraulic system AMM 29-10-00-864-001.
(2) De-energize the aircraft electrical circuits AMM 24-41-00-862-002.
(3) Move the aircraft and remove the greased plates AMM 09-10-00-584-002.
(4) Make sure that the work area is clean and clear of tool(s) and other items.

[Rev.8 from Aug 2018] 2026.04.04 04:31:50 UTC