Inspection After Brake Emergency Application or Overheat

TASK 05-51-16-200-001-A
Inspection After Brake Emergency Application or Overheat

WARNING: BE VERY CAREFUL WHEN THERE IS A BRAKE OVERHEAT AND/OR LANDING GEAR FIRE. THERE IS A RISK OF TIRE EXPLOSION AND/OR WHEEL RIM BURST THAT CAN CAUSE DEATH OR INJURY. MAKE SURE THAT YOU OBEY THE SAFETY PRECAUTIONS THAT FOLLOW.

WARNING: AFTER BRAKE OVERHEAT OR BRAKE FIRE, APPROACH THE LANDING GEAR WITH EXTREME CAUTION AND FROM AN OBLIQUE ANGLE IN THE DIRECTION OF THE TIRE SHOULDER. DO NOT GO INTO THE RIM HAZARD AREA AND ONLY GO IN THE TIRE HAZARD AREA WITH CAUTION. IF POSSIBLE, STAY IN A VEHICLE. DO NOT APPROACH THE LANDING GEAR MORE THAN NECESSARY.

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.

1. Reason for the Job
This inspection is necessary after a crew report when:

A brake temperature of more than the overheat threshold temperature occurred
A wheel fuse plug(s) melted
A brake fire occurred.

The temperature of the brakes can be too high after:

An acceleration-stop
The brakes are applied in an emergency
Frequent operation of the brakes
A failure of the braking control.

A high temperature of the brakes can cause:

One or more of the fuse plugs to melt
Damage to the tire
Possible damage to the wheel
Too much load on the opposite tire, which can cause damage to the tire.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	TOWBAR
No specific	1	TRACTOR (TOWBAR TYPE)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 05-51-15-200-001-A	Inspection after a Tire Burst or Tread Throw or Wheel Failure
TASK 10-11-00-555-015-A	Procedure for the Installation of Wheel Chocks on Aircraft
TASK 32-11-00-200-007-A	Inspection of the MLG Axles after a Brake Overheat
TASK 32-41-00-210-003-A	Functional Check of Tire Pressures
TASK 32-41-11-000-006-A	Removal of the MLG Wheel
TASK 32-41-11-400-006-A	Installation of the MLG Wheel
TASK 32-42-00-710-001-A	Operational Check of the Normal Braking System
TASK 32-42-27-000-001-A	Removal of the Brake
TASK 32-42-27-210-006-A	Inspection/Check of the Brake with the Wheel Removed
TASK 32-42-27-400-001-A	Installation of the Brake
TASK 32-42-71-000-001-A	Removal of the MLG Axle Adaptor-Sleeves
TASK 32-42-71-400-001-A	Installation of the MLG Axle Adaptor-Sleeves
TASK 32-43-00-710-001-A	Operational Check of Alternate Braking System
TSM 05-50-00-810-804	Tire Burst or Tread Throw or Wheel Failure or Flat Spot
TSM 05-50-00-810-825	Brake Emergency Application or Overheat
TSM 32-42-00-810-923	Brake Overheat with Fuse Plug Melted
TSM 32-42-00-810-924	Brake Overheat
Wheel/Brake Overheat Hazard Areas

3. Job Set-up
Subtask 05-51-16-941-050-A

A. Safety Precautions

WARNING: AFTER BRAKE OVERHEAT OR BRAKE FIRE, ONLY RESCUE AND FIRE FIGHTING SPECIALISTS CAN DO THE PROCEDURE TO DECREASE THE BRAKE TEMPERATURE OR EXTINGUISH THE BRAKE FIRE. FIREMEN HAVE THE NECESSARY EQUIPMENT AND PROCEDURES FOR THAT. IF MAINTENANCE PERSONNEL DO THE PROCEDURE TO DECREASE THE BRAKE TEMPERATURE OR EXTINGUISH THE BRAKE FIRE, INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.

CAUTION: DO NOT USE POWDER EXTINGUISHANTS OR DRY CHEMICALS. THE DEPOSITS CAN CHANGE INTO SOLID DEPOSITS AND PREVENT SATISFACTORY DISSIPATION OF THE HEAT. THIS CAN CAUSE PERMANENT STRUCTURAL DAMAGE TO :

THE BRAKE
THE WHEEL
THE WHEEL AXLE. YOU MUST NOT APPLY THE EXTINGUISHANT (WATER AND WATER MIST) DIRECTLY ON THE CARBON HEAT PACK OF THE BRAKE. THIS CAN CAUSE THERMAL SHOCK.

(1) Instructions for a brake overheat without fire or brake fire:
(a) Rescue and fire fighter specialists must do the procedures that follow:
1 The procedure to decrease the brake temperature after a brake overheat without fire
2 The procedure to extinguish landing gear fire.
(b) The risk of tire and/or wheel explosion is high. Thus, you must go near the landing gears very carefully.
(c) Firemen have their own necessary equipment and procedures to decrease the brake temperature or to extinguish brake fire.
(2) To prevent movement of the aircraft until the brakes become cool:
(a) Do not apply the parking brake.
(b) Attach the TOWBAR to the Nose Landing Gear (NLG) tow fitting and to the TRACTOR (TOWBAR TYPE) and apply the tractor hand brake.
(3) Do a check of the brake temperature on the Electronic Centralized Aircraft Monitoring (ECAM) display:
(a) If the brake temperature is more than or equal to the overheat threshold temperature:

You must wait until the brake temperature decreases to below the overheat threshold temperature.

NOTE: The temperature of the brakes can be much higher than the temperature shown on the ECAM.

(4) Do not use the brake cooling fans (if installed) because they can prevent the operation of the fuse plugs.
(5) Do not go near the landing gear more than necessary. If possible, stay in a vehicle.
(6) Do not apply water, foam or Carbon Dioxide (CO2). These cooling agents (and specially CO2, which has a very strong cooling effect) can cause thermal shocks and hot parts to break.
(7) After the brake temperature decreases:
If one tire is still inflated, do not go near the area around the wheel for approximately one hour.
(8) Go near the landing gear very carefully and from an oblique angle in the direction of the tire shoulder. Do not go into the rim hazard area and be very careful when you go into the tire hazard area.

Wheel/Brake Overheat Hazard Areas

Subtask 05-51-16-210-054-A ** ON A/C NOT FOR ALL

B. Overheat Threshold Temperature
To know the overheat threshold temperature TSM 32-42-00-810-923 or TSM 32-42-00-810-924 or refer to the brake installed on the aircraft:

For MESSIER/BF GOODRICH carbon brakes, the overheat threshold is 800 deg.C (1472.00 deg.F)
For ABS carbon brakes, the overheat threshold is 450 deg.C (842.00 deg.F).

Subtask 05-51-16-210-054-B ** ON A/C NOT FOR ALL

B. Overheat Threshold Temperature
To know the overheat threshold temperature TSM 32-42-00-810-923 or TSM 32-42-00-810-924 or refer to the brake installed on the aircraft:

For MESSIER BUGATTI carbon brakes, the overheat threshold is 900 deg.C (1652.00 deg.F)
For BF GOODRICH carbon brakes, the overheat threshold is 900 deg.C (1652.00 deg.F)
For ABS carbon brakes, the overheat threshold is 450 deg.C (842.00 deg.F).

Subtask 05-51-16-941-051-A

C. Aircraft configuration
(1) Do not apply the parking brake.
(2) Put a WARNING NOTICE(S) in the cockpit to tell persons not to operate the landing gear control lever.
(3) Put the CHOCK - WHEEL(S) in position when there is no risk of tire burst: (Ref. AMM TASK 10-11-00-555-015)

4. Procedure
Subtask 05-51-16-210-053-A

A. Inspection of the Aircraft
(1) If overheat is not because of the brake emergency application, refer to TSM 05-50-00-810-804 and TSM 05-50-00-810-825 to make sure that the hydraulic and electrical connections are correctly connected.
(2) If there is tire burst, do the inspection of the aircraft after a tire burst or tread throw (Ref. AMM TASK 05-51-15-200-001).

Subtask 05-51-16-210-057-A

B. Inspection of the Tires

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2
(1)	Do a check of all the MLG tires for flat spot. Make sure that you do a check of the full circumference of the tires.	X
	If you find flat spot:
	- Remove the related wheel (Ref. AMM TASK 32-41-11-000-006) (refer to the manufacturer's instructions for the tire replacement).		X
	- Install the serviceable wheel (Ref. AMM TASK 32-41-11-400-006).		X

Subtask 05-51-16-210-055-A

CAUTION: DO NOT TRY TO APPLY PRESSURE TO THE BRAKES WHEN THE ROTORS ARE NOT ALIGNED.

CAUTION: WHEN YOU EXAMINE THE PARTS OF THE ROTOR DISCS, BE CAREFUL NOT TO CAUSE DAMAGE TO THE PROTECTIVE FINISH (ANTI-OXIDATION PAINTS).

C. Inspection of the Wheels and Brakes

ITEM	INSPECTION TASKS	PHASE 1	PHASE 2
A.	Do this inspection if the brake temperature is less than the overheat threshold temperature but the fuse plug melted (tire deflated).
	(1) Remove the related wheel and the adjacent wheel for overhaul (Ref. AMM TASK 32-41-11-000-006). (Refer to the manufacturer's instructions for the overhaul procedure).	X
	(2) Examine the brake unit for damage or distortion (inspection/check of the brake with the wheel removed) (Ref. AMM TASK 32-42-27-210-006).	X
	(a) Make sure that there is no hydraulic fluid leakage at the piston, liners, supply lines, self-blanking unions and bleed screws.
	(b) Clean the piston housing with a cloth and make sure it is in the correct condition (no separation, no blisters).
	(c) Make sure that the heat pack is serviceable: - Carbon integrity - Free movement of the rotor discs - Cracks or signs of oxidation on the part of the rotor discs you can see.
	If you find damage:
	- Remove the damaged brake unit for overhaul (Ref. AMM TASK 32-42-27-000-001). (Refer to the manufacturer's instructions for the overhaul procedure).		X
	(3) Installation of the removed components
	(a) Install serviceable components: - For the brakes (Ref. AMM TASK 32-42-27-400-001) - For the wheels (Ref. AMM TASK 32-41-11-400-006).
B.	Do this inspection if the brake temperature is more than the overheat threshold temperature, with the fuse plug melted or not.
	(1) Remove the related wheel for overhaul (Ref. AMM TASK 32-41-11-000-006). (Refer to the manufacturer's instructions for the overhaul procedure).	X
	(2) If the fuse plug is melted, remove the adjacent wheel for overhaul (Ref. AMM TASK 32-41-11-000-006). (Refer to the manufacturer's instructions for the overhaul procedure).	X
	(3) Remove the brake for overhaul (Ref. AMM TASK 32-42-27-000-001). (Refer to the manufacturer's instructions for the overhaul procedure).	X
	(4) Remove the axle sleeve (Ref. AMM TASK 32-42-71-000-001).	X
	(5) Do the inspection of the MLG axles after brake overheat (Ref. AMM TASK 32-11-00-200-007).	X
	(6) Examine the axle sleeve for distortion and damaged surface.	X
	(7) Installation of the removed components
	(a) Install serviceable components: - For the axle sleeve (Ref. AMM TASK 32-42-71-400-001) - For the brakes (Ref. AMM TASK 32-42-27-400-001) - For the wheels (Ref. AMM TASK 32-41-11-400-006).
C.	Do this inspection if the brake temperature is less than the overheat threshold temperature, with the fuse plug not melted (tire not deflated).
	(1) Do a check of the tire pressure (Ref. AMM TASK 32-41-00-210-003).	X
	If the pressure of one or more wheels are lower than others:
	- Remove the related wheel(s) (Ref. AMM TASK 32-41-11-000-006) (refer to the manufacturer's instructions for the fuse plug replacement).		X
	- Install the serviceable wheel(s) (Ref. AMM TASK 32-41-11-400-006).		X

5. Close-up
Subtask 05-51-16-710-050-A

A. Operational Test of the Systems
(1) Do an operational test of the normal braking system (Ref. AMM TASK 32-42-00-710-001).
(2) Do an operational test of the alternate braking system (Ref. AMM TASK 32-43-00-710-001).

Subtask 05-51-16-942-051-A

B. Put the aircraft back to its initial configuration.
(1) Remove the WARNING NOTICE(S).
(2) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.03.31 22:51:27 UTC