General Visual Inspection of L/G Brake Units

TASK 32-40-00-210-801-A
General Visual Inspection of L/G Brake Units

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: LET THE BRAKES AND THE WHEELS BECOME COOL BEFORE YOU GO NEAR THE LANDING GEAR. DO NOT APPLY A LIQUID OR GAS DIRECTLY ON A HOT WHEEL OR BRAKE UNIT. THIS CAN CAUSE A TIRE EXPLOSION AND/OR A WHEEL RIM BURST.

ZONE: 731
ZONE: 741

1. Reason for the Job
Refer to the MPD TASK: 324000-16
GENERAL VISUAL INSPECTION OF L/G BRAKE UNITS
To be done together with the brake-unit wear check.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
731	L.H MAIN GEAR
741	R.H MAIN GEAR

C. 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 32-42-27-000-001-A	Removal of the Brake
TASK 32-42-27-210-001-A	Inspection/Check of the Brake with the Wheel Installed
TASK 32-42-27-400-001-A	Installation of the Brake
Landing-Gear Brake Units ** ON A/C NOT FOR ALL
Landing-Gear Brake Units ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 32-40-00-860-057-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 32-40-00-941-053-A

B. 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 CHOCK - WHEEL(S) are in position.
(3) In the cockpit, on the right-center instrument panel (400VU), put the WARNING NOTICE(S) in position to tell persons not to operate the landing-gear control lever (6GA).
(4) In the cockpit, put the WARNING NOTICE(S) in position to tell persons not to operate the brake pedals.
(5) In the cockpit, on the rudder-trim/parking brake panel (110VU):

Set the PARKING BRK control switch (73GG) to the OFF position.
Put the WARNING NOTICE(S) in position to tell persons not to operate the PARKING BRK control switch (73GG).

Subtask 32-40-00-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C 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

4. Procedure
Subtask 32-40-00-210-061-A

A. General Visual Inspection (GVI) of Landing-Gear (L/G) Brake Units
(1) Examine the brake units, as far as you can without removal, for signs of:

Leakage
Missing parts (bolts, fasteners,...)
Cracks
Wear
Structural damage
Corrosion
Damaged threads
Chemical oxidation, caused by the chemicals in dry powder fire extinguishers and/or runway de-icers. This can make the outer surface of the pressure plates looks soft or porous.
Thermal oxidation, caused by too much heat. This can make the outer surface of the carbon stators and/or rotor discs look soft or porous.

(a) If you find missing parts and/or damage, replace the brake (Ref. AMM TASK 32-42-27-000-001) (Ref. AMM TASK 32-42-27-400-001).
(b) If you find signs of leakage, find the source of the leakage.
1 Do an inspection of the brake with the wheel installed (Ref. AMM TASK 32-42-27-210-001).

If the leakage comes from the brake, replace it (Ref. AMM TASK 32-42-27-000-001) (Ref. AMM TASK 32-42-27-400-001).
If the leakage does not come from the brake, find the source of the leakage and do the necessary repair.

5. Close-up
Subtask 32-40-00-860-058-A

A. Put the aircraft back to its initial configuration.
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 32-40-00-941-054-A

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

[Rev.10 from 2021] 2026.04.01 00:46:54 UTC