05-51-00
ALL ú ú 01.1 Page 202 ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
BRAKE SEIZURE CONDITION - MAINTENANCE PRACTICES (CONDITIONAL INSPECTION)
________________________________________________________________________
TASK 05-51-04-212-001
1. Brake Seizure Conditional Inspection
____________________________________
A. References
(1)
05-51-07/201, High Energy Stop/Heat Damage Condition
(2)
32-41-41/401, Main Gear Wheel Brake
(3)
32-41-41/601, Main Gear Wheel Brake
(4)
32-45-00/601, Main Gear Wheel and Tire
B. Inspect Main Landing Gear Wheels and Brakes
S 212-010
(1)
Do this task: Wheel Inspection (Wheel removed from the airplane) (AMM 32-45-00/601).
S 212-011
(2)
Do this task: Tire inspection (AMM 32-45-00/601).
S 022-002
(3)
Remove the seized brake unit do this task: Main landing gear brake removal (AMM 32-41-41/401).
NOTE: The brake assembly must be sent to the shop for disassembly
____
and a detailed inspection.
S 212-004
(4)
Inspect the wheel bearing seal adjacent to the brake and replace the seal if it is damaged by heat (AMM 32-41-41/601).
S 212-005
(5)
Inspect the joint on the axles and on the adjacent areas of the truck beam for a brown shade color that indicates overheating (AMM 05-51-07/201).
(a) If the paint is a brown shade color, repair the damage.
S 212-006
(6) Examine the inflated tires and wheels for damage you can see (AMM 32-45-00/601).
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05-51-04
ALL ú ú 02 Page 201 ú Jul 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
HIGH ENERGY STOP/HEAT DAMAGE CONDITION - MAINTENANCE PRACTICES
______________________________________________________________ (CONDITIONAL INSPECTION)
________________________
1. General_______
A. This section gives an examination procedure for landing gear cylinders, wheels, and brakes after a high energy stop condition. The extent of the examination depends on the level of absorbed kinetic energy.
B. The approximate energy absorbed by a brake unit can be found by the use of the brake energy chart (Fig. 201). Use of the chart will provide only an approximation of the energy absorbed during the stop. The factors that follow will also affect the energy absorbed:
(1)
Residual energy from the previous stop
(2)
The runway slope
(3)
The wind conditions
(4)
Thrust reverser use.
C. Approximate energy absorbed by a brake example, with the use of Fig. 201, is as follows:
(1)
Landing Gross Weight - 91,000 pounds (41,278 kg)
(2)
Brakes on Speed - 120 knots (no wind)
(3)
Pressure Altitude - 5000 ft
(4)
Outside Air Temperature - 86°F (30°C)
(5)
Normal Landing Stop Using Auto Brake Setting 2
(6)
Normal Reverse, Number 2 Detent
(7)
No Taxi Distance
(8)
Resultant Brake Energy - 8.2 million foot-pounds
(9)
Resultant is in the COOLING RECOMMENDED range
D. A high energy condition can be a refused takeoff. It can also be any stop or sequence of stops that collects energy. An indication that a high energy stop, or equivalent, has been made is the release of a wheel fuse plug. Energy levels can be different between brakes.
TASK 05-51-07-212-001
2. High Energy Stop
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A. Equipment
WARNING: THE POWER CABLE OF THE BORESCOPE MUST BE
_______
IN GOOD CONDITION. IF THERE ARE ANY
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