Removal of the Alternate-Brake Manifold

TASK 32-43-32-000-001-A
Removal of the Alternate-Brake Manifold

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.

ZONE: 571
ZONE: 671
FIN: 2852GM ** ON A/C NOT FOR ALL
FIN: 2853GM ** 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	AR	CAP - BLANKING
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
571	MLG BAY
671	MLG BAY

C. Referenced Information

REFERENCE	DESIGNATION
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-23-00-860-001-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
TASK 32-44-19-000-001-A	Removal of the Pressure Transducer
Alternate-Brake Manifold 2853GM(2852GM) - Location and Detail

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

A. Safety Precautions
(1) Put the SAFETY BARRIER(S) in position.
(2) Make sure that the ground safety locks are installed 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 the WARNING NOTICE(S) in position to tell persons not to operate the landing gear.

(4) Put the WARNING NOTICE(S) on the ground service connection to tell persons not to pressurize the Yellow hydraulic system.

Subtask 32-43-32-860-050-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.
(3) Disconnect the isolation coupling of the Power Transfer Unit (PTU) (Ref. AMM TASK 29-23-00-860-001).

Subtask 32-43-32-865-050-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
49VU	ABCU &/Y BRK/PRESS IND	61GG	C10
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
121VU	ABCU/HOT BUS/SPLY	110GG	P30
** 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
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
121VU	ABCU/HOT BUS/SPLY	110GG	P31
** ON A/C NOT FOR ALL
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

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

D. 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 (6).

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

A. Removal of the Alternate-Brake Manifold

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) Disconnect the electrical connectors (1) and (2).
(2) Put a CAP - BLANKING on the disconnected electrical connectors.
(3) Disconnect the hydraulic connectors (3) and (7) from the manifold (6).
(4) Put a CAP - BLANKING on the disconnected line ends.
(5) Remove the four bolts (4) and the eight washers (5) and remove the manifold (6).
(6) If it is necessary to install a replacement manifold (6), remove the pressure transducer from the removed manifold (6) (Ref. AMM TASK 32-44-19-000-001).

[Rev.10 from 2021] 2026.04.01 00:49:11 UTC