Functional Test of the Nose Wheel Steering with the CFDS

TASK 32-51-00-720-007-A
Functional Test of the Nose Wheel Steering with the CFDS

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

WARNING: MAKE SURE THAT THE CONTROLS AGREE WITH THE POSITION OF THE ITEMS THEY OPERATE BEFORE YOU PRESSURIZE A HYDRAULIC SYSTEM. UNWANTED MOVEMENT OF HYDRAULICALLY OPERATED ITEMS CAN CAUSE SERIOUS INJURY AND/OR DAMAGE.

CAUTION: BEFORE YOU START THE NOSE WHEEL STEERING TEST, MAKE SURE THAT NO BOARDING BRIDGES ARE CONNECTED TO THE PASSENGER/CREW DOORS. IF A BOARDING BRIDGE IS CONNECTED, DAMAGE CAN OCCUR TO THE AIRCRAFT.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 29-10-00-863-003-A	Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-863-003-A-01	Pressurize the Blue Hydraulic System with the Blue Electric Pump
TASK 29-10-00-864-003-A	Depressurize the Blue Hydraulic System
TASK 31-32-00-860-009-A	Procedure to Get Access to the SYSTEM REPORT/TEST/L/G Page
TASK 32-51-11-000-001-A	Removal of the Transmitter Unit - Nose-Wheel Steering Handwheel
TASK 32-51-11-400-001-A	Installation of the Transmitter Unit - Nose-Wheel Steering Handwheel

3. Job Set-up
Subtask 32-51-00-860-087-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Pressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-863-003).
(3) On the MCDU, get the SYSTEM REPORT/TEST L/G page (Ref. AMM TASK 31-32-00-860-009).
(4) On the panel 402VU, make sure that the A/SKID switch is at ON.

Subtask 32-51-00-941-064-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) Put the WARNING NOTICE(S) in position to tell persons:

not to operate the A/SKID switch,
not to pressurize the Green and the Yellow hydraulic systems.

Subtask 32-51-00-860-087-B ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) On the MCDU, get the SYSTEM REPORT/TEST L/G page (Ref. AMM TASK 31-32-00-860-009).
(3) On the panel 402VU, make sure that the A/SKID switch is at ON.

Subtask 32-51-00-941-064-B ** ON A/C NOT FOR ALL

D. Safety Precautions
(1) Put the WARNING NOTICE(S) in position to tell persons:

not to operate the A/SKID switch,
not to pressurize the Green, the Blue and the Yellow hydraulic systems.

Subtask 32-51-00-865-117-A

E. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY	4GG	M36
121VU	HYDRAULIC/BRAKING AND STEERING/SYS2/CTL	3GG	M35
121VU	HYDRAULIC/BRAKING AND STEERING/SYS1/CTL	1GG	M34
121VU	HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY	2GG	M33

4. Procedure
Subtask 32-51-00-720-061-B ** ON A/C NOT FOR ALL

A. Test

ACTION	RESULT
1.Open the circuit breakers 1GG, 2GG, 3GG and 4GG. Then close the circuit breakers 1GG and 2GG first, then 3GG and 4GG to make sure that you put the BSCU CHAN 1 in the active mode.
2.On the MCDU, push the line key adjacent to the BSCU 1 indication.	The BSCU CHAN 1 page comes into view.
3.Push the line key adjacent to the SPECIFIC DATA indication.	The BSCU CHAN 1/SPECIFIC DATA page comes into view.
4.Push the line key adjacent to the STEERING DATA indication.	The BSCU CHAN 1/STEERING DATA page comes into view.
5.Turn the CAPT handwheel fully counterclockwise and hold it in position. On the MCDU, push the line key adjacent to the REFRESH indication.	On the STEERING DATA page, make sure that the SPOTCAP value is +75 +0/-3.6 degrees.
6.Release the CAPT handwheel to the neutral position.
7.Turn the CAPT handwheel fully clockwise and hold it in position. On the MCDU, push the line key adjacent to the REFRESH indication.	On the STEERING DATA page, make sure that the SPOTCAP value is -75 +3.6/-0 degrees.
8.Release the CAPT handwheel to the neutral position.
9.Set and hold a rudder angle with the rudder pedals. On the MCDU, push the line key adjacent to the REFRESH indication.	On the SYSTEM DATA page 3/3, the rudder-pedal order value is different from 0 plus or minus 0.35 degrees (this value is shown below the REFRESH indication).
10.Push the line key adjacent to the RETURN indication to get the SPECIFIC DATA indication	The BSCU CHAN 1/SPECIFIC DATA page comes into view.
11.Push the line key adjacent to the SYSTEM DATA indication and get the page 3/3.	The BSCU CHAN 1/SPECIFIC DATA/ SYSTEM DATA page 3/3 comes into view.
12.On the CAPT handwheel, push and hold the rudder-pedal disconnection pushbutton-switch. On the MCDU, push the line key adjacent to the REFRESH indication.	On the SYSTEM DATA page 3/3 the rudder-pedal order value is invalid (-----), (this value is shown below the REFRESH indication).
13.Release the rudder-pedal disconnection pushbutton-switch.
14.Do again the steps 5 to 12 with the F/O handwheel.	Same results as for the CAPT handwheel but with the SPOTFO value.
15.Push the line key adjacent to the RETURN indication to get the SYSTEM REPORT/TEST L/G page.	The SYSTEM REPORT/TEST L/G page comes into view.
16.Push the line key adjacent to the BSCU CHAN 2 indication.	The BSCU CHAN 2 page comes into view.
17.Do again the steps 3 to 14.	Same results as for the BSCU CHAN 1.
18.Push the line key adjacent to the RETURN indication to get the SYSTEM REPORT/TEST L/G page.	The SYSTEM REPORT/TEST L/G page comes into view.
19.Push the line key adjacent to the BSCU CHAN 1 indication.	The BSCU CHAN 1 page comes into view.
20.Push the line key adjacent to the GND SCAN indication.	The BSCU CHAN 1/GROUND SCANNING page comes into view. Make sure that none of these messages related to the steering handwheel are shown: 780 : STEERING HANDWHEEL (1GC/2GC) SPLY 781 : STEERING HANDWHEEL (1GC/2GC) SPLY 785 : CAPT STEERING HDWHL (1GC)/ BSCU (10GG) 786 : F/O STEERING HDWHL (2GC)/ BSCU (10GG) 790 : CAPT STEERING HDWHL (1GC)/ BSCU (10GG) 791 : F/O STEERING HDWHL (2GC)/ BSCU (10GG) 803 : CAPT STEERING HDWHL (1GC)/ BSCU (10GG) 804 : F/O STEERING HDWHL (2GC)/ BSCU (10GG)
21.If one or more of these messages is (are) shown: Do only a check of the wiring related to the trouble shooting procedure Do a reset of the BSCU 1 Do again the steps 2 to 19.
22.If one or more of these messages is (are) shown again: Replace the handwheel (Ref. AMM TASK 32-51-11-000-001) (Ref. AMM TASK 32-51-11-400-001).
23.Open the circuit breakers 1GG and 2GG. Then close them to make sure that you put the BSCU CHAN 2 in the active mode. Do again the steps 18 to 21 for the BSCU CHAN 2:	Same results as for the BSCU CHAN 1.

Subtask 32-51-00-720-061-C ** ON A/C NOT FOR ALL

A. Test

ACTION	RESULT
1.Open the circuit breakers 1GG, 2GG, 3GG and 4GG. Then close the circuit breakers 1GG and 2GG first, then 3GG and 4GG to make sure that you put the BSCU CHAN 1 in the active mode.
2.On the MCDU, push the line key adjacent to the BSCU 1 indication.	the BSCU CHAN 1 page comes into view.
3.Push the line key adjacent to the SPECIFIC DATA indication.	the BSCU CHAN 1/SPECIFIC DATA page comes into view.
4.Push the line key adjacent to the STEERING DATA indication.	the BSCU CHAN 1/STEERING DATA page comes into view.
5.Turn the CAPT handwheel fully counterclockwise and hold it in position. On the MCDU, push the line key adjacent to the REFRESH indication.	on the STEERING DATA page, make sure that the SPOTCAP value is +75 +0/-3.6 degrees.
6.Release the CAPT handwheel to the neutral position.
7.Turn the CAPT handwheel fully clockwise and hold it in position. On the MCDU, push the line key adjacent to the REFRESH indication.	on the STEERING DATA page, make sure that the SPOTCAP value is -75 +3.6/0 degrees.
8.Release the CAPT handwheel to the neutral position.
9.Push the line key adjacent to the RETURN indication to get the SPECIFIC DATA indication	the BSCU CHAN 1/SPECIFIC DATA page comes into view.
10.Push the line key adjacent to the SYSTEM DATA indication and get the page 3/3.	the BSCU CHAN 1/SPECIFIC DATA/ SYSTEM DATA page 3/3 comes into view.
11.Set and hold a rudder angle with the rudder pedals. On the MCDU, push the line key adjacent to the REFRESH indication.	on the SYSTEM DATA page 3/3, the rudder-pedal order value is different from 0 plus or minus 0.35 degrees (this value is shown below the REFRESH indication).
12.On the CAPT handwheel, push and hold the rudder-pedal disconnection pushbutton-switch. On the MCDU, push the line key adjacent to the REFRESH indication.	on the SYSTEM DATA page 3/3, the rudder-pedal order value is invalid (-----) (this value is shown below the REFRESH indication).
13.Release the rudder-pedal disconnection pushbutton-switch.
14.Do again the steps 5 to 13 with the F/O handwheel and F/O rudder pedals.	same results as for the CAPT handwheel and CAPT rudder pedals.
15.Push the line key adjacent to the RETURN indication to get the SYSTEM REPORT/TEST L/G page.	the SYSTEM REPORT/TEST L/G page comes into view.
16.Push the line key adjacent to the BSCU 2 indication.	the BSCU CHAN 2 page comes into view.
17.Do again the steps 2 to 14.	same results as for the BSCU 1.
18.Push the line key adjacent to the RETURN indication to get the SYSTEM REPORT/TEST L/G page.	the SYSTEM REPORT/TEST L/G page comes into view.
19.Push the line key adjacent to the BSCU 1 indication.	the BSCU CHAN 1 page comes into view.
20.Push the line key adjacent to the GND SCAN indication.	the BSCU CHAN 1/GROUND SCANNING page comes into view. Make sure that none of these messages related to the steering handwheel are shown: 780 : STEERING HANDWHEEL (1GC/2GC) SPLY 781 : STEERING HANDWHEEL (1GC/2GC) SPLY 785 : CAPT STEERING HDWHL (1GC)/ BSCU (10GG) 786 : F/O STEERING HDWHL (2GC)/ BSCU (10GG) 790 : CAPT STEERING HDWHL (1GC)/ BSCU (10GG) 791 : F/O STEERING HDWHL (2GC)/ BSCU (10GG) 803 : CAPT STEERING HDWHL (1GC)/ BSCU (10GG) 804 : F/O STEERING HDWHL (2GC)/ BSCU (10GG
21.If one or more of these messages is (are) shown: do only a check of the wiring related to the trouble shooting procedure do a reset of the BSCU 1 do again the steps 2 to 20.
22.If one or more of these messages is (are) shown again: replace the handwheel (Ref. AMM TASK 32-51-11-000-001) (Ref. AMM TASK 32-51-11-400-001).
23.Open the circuit breakers 1GG and 2GG. Then close them to make sure that you put the BSCU CHAN 2 in the active mode. Do again the steps 19 to 22 for the BSCU CHAN 2:	same results as for the BSCU CHAN 1.

5. Close-up
Subtask 32-51-00-860-086-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Depressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-864-003).
(2) On the MCDU, push the line key adjacent to the RETURN indication until the CFDS menu page comes into view.
(3) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 32-51-00-860-086-B ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) On the MCDU, push the line key adjacent to the RETURN indication until the CFDS menu page comes into view.
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 00:51:11 UTC