Removal of the Alternate Brake Safety-Valve

TASK 32-43-16-000-001-A
Removal of the Alternate Brake Safety-Valve

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

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.

FIN: 2620GM ** ON A/C NOT FOR ALL
FIN: 2621GM ** ON A/C NOT FOR ALL
FIN: 2622GM ** ON A/C NOT FOR ALL
FIN: 2623GM ** ON A/C NOT FOR ALL

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

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 3M (10 FT)
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	AR	COVER - PROTECTION
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
Alternate Brake Safety-Valve
Alternate Brake Safety-Valve

3. Job Set-up
Subtask 32-43-16-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) On the panel 400VU:

make sure that the landing-gear control-lever 6GA is in the DOWN position
put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear.

(4) Put a WARNING NOTICE(S) on the ground service connection to tell persons not to pressurize the Yellow hydraulic system.
(5) Operate the brake pedals until the brake accumulator of the yellow hydraulic system is at zero pressure.

Subtask 32-43-16-860-052-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Disconnect the Isolation Coupling of the Power Transfer Unit (PTU) (Ref. AMM TASK 29-23-00-860-001).
(2) Make sure that the hydraulic systems are depressurized (Ref. AMM TASK 29-00-00-864-001).
(3) Make sure that the applicable hydraulic reservoir is depressurized (Ref. AMM TASK 29-14-00-614-001).

Subtask 32-43-16-865-050-A ** ON A/C NOT FOR ALL

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR 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
121VU	HYDRAULIC/PARK BRK/CTL/STBY	71GG	N37
121VU	HYDRAULIC/PARK BRK/CTL/NORM	70GG	N36
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 32-43-16-010-050-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Put an ACCESS PLATFORM 3M (10 FT) below the applicable false rear spar at the alternate brake manifold.

4. Procedure
Subtask 32-43-16-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Alternate Brake Safety-Valve

Alternate Brake Safety-Valve ** ON A/C NOT FOR ALL

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

WARNING: DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:

FLUSH IT AWAY WITH CLEAN WATER
GET MEDICAL AID.

CAUTION: MAKE SURE THAT THE FLUID DOES NOT STAY ON THE AIRCRAFT STRUCTURE. IF THE FLUID GETS ON THE AIRCRAFT STRUCTURE, WASH IT OFF IMMEDIATELY WITH SOAP AND WATER.

(1) Put a CONTAINER 5 L (1.32 USGAL) below the applicable alternate brake safety-valve (1).
(2) Remove the screws (2) and remove the alternate brake safety-valve (1).
(3) Remove the bobbin (10) and the filter (7) from the alternate brake manifold.
(4) Remove and discard the packings (8) and the back-up rings (9) from the bobbin (10).
(5) Remove and discard the packings (3) and (6), the retainer (5) and the back-up ring (4) from the filter (7).
(6) Keep the bobbin (10) and the filter (7) with the alternate brake manifold.
(7) Put a COVER - PROTECTION on the alternate brake manifold, the bobbin (10) and the filter (7) to prevent damage to the interfaces.

[Rev.10 from 2021] 2026.04.01 00:48:56 UTC