Reactivation of the Alternate-Brake Manifold Safety-Valve

TASK 32-43-32-600-001-A
Reactivation of the Alternate-Brake Manifold 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.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 571
ZONE: 671

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	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 4.0 and 3.85 m.daN (29.50 and 28.39 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
571	MLG BAY
671	MLG BAY

D. Referenced Information

REFERENCE	DESIGNATION
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 32-43-00-710-001-A	Operational Check of Alternate Braking System
TASK 32-43-00-870-002-A	Bleeding of the High Pressure Alternate Braking System
Alternate-Brake Manifold Safety-Valve Reactivation Plug

3. Job Set-up
Subtask 32-43-32-941-052-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 installed on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) On panel 400VU:

Make sure that the landing-gear control lever 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.

Subtask 32-43-32-860-053-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that the Yellow hydraulic system has been depressurized (Ref. AMM TASK 29-00-00-864-001).
(2) Operate the brake pedals until the pressure in the brake accumulator of the Yellow hydraulic system is at zero.

Subtask 32-43-32-010-051-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT) below the applicable false rear spar, at zone 571 (671).
(2) Put a CONTAINER 5 L (1.32 USGAL) below the applicable alternate-brake manifold.

4. Procedure
Subtask 32-43-32-440-050-A ** ON A/C NOT FOR ALL

A. Reactivation of the Alternate-Brake Manifold Safety-Valve

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

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) Remove and discard the lockwire from the reactivation plug (1).
(2) Slowly loosen the reactivation plug (1) to release the hydraulic pressure.

NOTE: Do not loosen the reactivation plug (1) more than 2.5 turns.

(3) Make sure that the seal (2) is correctly installed on the reactivation plug (1).
(4) Tighten the reactivation plug (1) and torque it to between 4.0 and 3.85 m.daN (29.50 and 28.39 lbf.ft )

.
(5) Use a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to remove unwanted hydraulic fluid from:

the alternate-brake manifold and the adjacent area.

(6) Safety the reactivation plug (1) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.

Subtask 32-43-32-870-051-A ** ON A/C NOT FOR ALL

B. Bleed the Brake System
(1) Bleed the alternate brake system (Ref. AMM TASK 32-43-00-870-002).

Subtask 32-43-32-710-051-A ** ON A/C NOT FOR ALL

C. Test
(1) Do an operational test of the alternate brake system (Ref. AMM TASK 32-43-00-710-001).
(2) Make sure that there are no hydraulic leaks at the reactivation plug (1).

5. Close-up
Subtask 32-43-32-942-051-A ** ON A/C NOT FOR ALL

A. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the SAFETY BARRIERS.
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 12:32:02 UTC