Reactivation of the Alternate-Brake Safety-Valve

TASK 32-43-16-600-001-A
Reactivation 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: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 571
ZONE: 671
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 1 L (1/4 USGAL)
No specific	1	HOSE - BLEED
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. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
2	PACKING	AIPC 32-43-16-01-080
3	PACKING	AIPC 32-43-16-01-080

E. Referenced Information

REFERENCE	DESIGNATION
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 Safety-Valve, P/N C24757000
Alternate-Brake Safety-Valve, P/N C25243002-2

3. Job Set-up
Subtask 32-43-16-941-052-A ** ON A/C NOT FOR ALL

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

Operate the landing gear
Pressurize the yellow hydraulic system.

(2) Put the ACCESS PLATFORM 3M (10 FT) in position at the applicable zone 571(671).

4. Procedure
Subtask 32-43-16-440-050-A ** ON A/C NOT FOR ALL

A. Reactivation of the Alternate-Brake Safety-Valve, P/N C24757000

Alternate-Brake Safety-Valve, P/N C24757000 ** ON A/C NOT FOR ALL

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) Put the CONTAINER 1 L (1/4 USGAL) below the applicable alternate-brake safety-valve (4).
(2) Remove the dust cap (1) from the applicable bleed screw (2).
(3) Cut, remove and discard the lockwire from the bleed screw (2).
(4) Put the HOSE - BLEED between the bleed screw (2) and the CONTAINER 1 L (1/4 USGAL).
(5) Slowly loosen the bleed screw (2) to release the hydraulic pressure.
(6) When the fluid flow stops, do a check of the packing (3).
(a) If the packing (3) is damaged, do the steps that follow:
1 Remove the bleed screw (2).
2 Remove and discard the packing (3) from the bleed screw (2).
3 Install a new AIPC 32-43-16-01-080 PACKING (3) on the bleed screw (2).
4 Loosely install the bleed screw (2).
(7) Remove the HOSE - BLEED and the CONTAINER 1 L (1/4 USGAL).
(8) Tighten the bleed screw (2) until it touches the alternate-brake safety-valve (4), then tighten it to one-eighth of a turn.
(9) Use Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to remove the unwanted hydraulic fluid from the alternate-brake safety-valve (4).
(10) Safety the bleed screw (2) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(11) Install the dust cap (1) to the applicable bleed screw (2).
(12) Bleed the alternate braking system (Ref. AMM TASK 32-43-00-870-002).
(13) Make sure that the work area is clean and clear of tools and other items.

Subtask 32-43-16-440-051-A ** ON A/C NOT FOR ALL

B. Reactivation of the Alternate-Brake Safety-Valve, P/N C25243002-2

Alternate-Brake Safety-Valve, P/N C25243002-2 ** ON A/C NOT FOR ALL

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

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) Cut, remove and discard the lockwire from the plug (1).
(2) Slowly loosen the plug (1) to release the hydraulic pressure.

NOTE: You must not loosen the plug (1) more than 2.5 turns.

(3) When the fluid flow stops, do a check of the packing (2).
(a) If the packing (2) is damaged, do the steps that follow:
1 Remove the plug (1).
2 Remove and discard the packing (2) from the plug (1).
3 Install a new AIPC 32-43-16-01-080 PACKING (2) on the plug (1).
4 Loosely install the plug (1).
(4) Use Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to remove the unwanted hydraulic fluid from the alternate-brake safety-valve (3) and the adjacent area.
(5) TORQUE the plug (1) to between 4.0 and 3.85 m.daN (29.50 and 28.39 lbf.ft )

.
(6) Safety the plug (1) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(7) Bleed the alternate braking system (Ref. AMM TASK 32-43-00-870-002).

Subtask 32-43-16-710-052-A ** ON A/C NOT FOR ALL

C. Test
(1) Do an operational test of the alternate braking system (Ref. AMM TASK 32-43-00-710-001).
(2) Examine the safety valve and the component interface for leaks.

5. Close-up
Subtask 32-43-16-942-051-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 00:48:55 UTC