Operational Test of Alternate Braking System without Anti Skid

TASK 32-44-00-710-002-A
Operational Test of Alternate Braking System without Anti Skid

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

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.

WARNING: PRESSURIZE ONLY THE HYDRAULIC SYSTEM(S) THAT IS (ARE) NECESSARY FOR THE TASK. ISOLATE THE OTHER HYDRAULIC SYSTEM(S) BEFORE YOU SUPPLY HYDRAULIC POWER 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 29-10-00-863-002-A	Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-23-00-864-001-A	Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU
TASK 29-24-00-863-001-A	Pressurize the Yellow Hydraulic System with the Electric Pump

3. Job Set-up
Subtask 32-44-00-865-051-A ** ON A/C NOT FOR ALL

A. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	ABCU &/Y BRK/PRESS IND	61GG	C10
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

Subtask 32-44-00-860-053-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) On the panel 400VU, make sure that the Landing Gear control lever is at DOWN.
(3) On the panel 402VU, make sure that the A/SKID & N/W STRG switch is at OFF.
(4) On the panel 110VU, make sure that the PARK BRK control switch is at OFF.
(5) Pressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-863-002) or (Ref. AMM TASK 29-24-00-863-001).
(6) Make sure that the Green hydraulic system is depressurized (Ref. AMM TASK 29-10-00-864-001).

Subtask 32-44-00-941-052-A ** ON A/C NOT FOR ALL

C. Safety Precautions
(1) Put the WARNING NOTICE(S) in position to tell persons not to:

operate the landing gear control lever,
pressurize the Green hydraulic system.

4. Procedure
Subtask 32-44-00-710-051-A ** ON A/C NOT FOR ALL

A. Operational Test of the Alternate Braking without Anti Skid

ACTION	RESULT
1.Push in the two brake pedals on the CAPT or F/O side.	On the panel 400VU, the brake yellow pressure triple indicator shows the left and right side pressure values. The pistons related to the Yellow hydraulic system are extended.
2.Release the brake pedals.	The triple indicator shows that the pressure supplied to the brakes decreases to zero. The pistons related to the Yellow hydraulic system are retracted.
3.Slowly push the brake pedals on the CAPT or F/O side.	On the panel 400VU: the pressure supplied to the brakes increases in proportion to the pressure you put on the pedals, the pressure shown at full pedal movement is between 870 psi (60 bar) and 1160 psi (80 bar).
4.Release the brake pedals

Subtask 32-44-00-860-054-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Depressurize the Yellow hydraulic systems (Ref. AMM TASK 29-23-00-864-001).
(2) On the panel 110VU, put the PARK BRK control switch at ON.

5. Close-up
Subtask 32-44-00-942-051-A ** ON A/C NOT FOR ALL

A. Removal of Equipment
(1) Remove the warning notice(s).
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:22:11 UTC