(a)
Gain access to the section 41, left lower lobe, via the forward EE bay hatch.
(b)
Connect the electrical connector on the forward overboard valve.
(c)
Move the red valve selector handle to the open position.
S 432-023
(5)
If you removed airplane equipment to do this test, use the
applicable maintenance manual chapters to install it.
(6)
Put the EQUIP COOLING valve switch to NORM.
S 432-030
(7)
Connect the pitot pressure hose to the standby ASI, if it was disconnected.
S 862-024
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A 747-400 MAINTENANCE MANUAL
(8) S 432-025Install the standby ASI if it was disconnected and used as a test instrument (AMM 34-13-01/401).
NOTE:____ Remove the independent ASI.
(9) S 862-026Remove the electrical power if it is not necessary (AMM 24-22-00/201).
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747-400 MAINTENANCE MANUAL
BRAKE DRAG OR SEIZURE CONDITION (CONDITIONAL INSPECTION) -
________________________________________________________ MAINTENANCE PRACTICES
_____________________
1. General
_______
A. One task is supplied in this procedure. The task is brake drag or seizure conditional inspection.
B. The inspection examines the brakes and adjacent components for damage caused by a condition of high heat. The high heat condition was caused as a result of brake drag or brake seizure.
TASK 05-51-09-202-001
2. Brake Drag or Seizure Conditional Inspection
____________________________________________
A. References
(1)
AMM 07-11-03/201, Jacking Airplane Axles
(2)
AMM 12-15-03/301, Wing Landing Gear Shock Strut
(3)
AMM 32-41-15/401, Landing Gear Brake Unit
(4)
AMM 32-45-01/401, Main Gear Tire and Wheel
(5)
AMM 32-45-03/601, Wheels Inspection
(6)
AMM 32-45-04/601, Tire Inspection
B. Procedure
S 862-002
(1)
Make sure that the parking brake is not set.
S 582-003
(2)
Jack the axle (AMM 07-11-03/201).
S 982-004
(3)
Turn the wheel assembly by hand.
(a)
If the wheel assembly turns, the brake is not seized and the inspection is completed.
(b)
If the wheel assembly cannot turn, continue with the inspection.
(4)
Examine the brake assembly.
S 212-018
(5)
Remove the wheel and tire assembly of the main landing gear (AMM 32-45-01/401).
S 212-013
NOTE: You must remove the wheel and tire assembly before you can
____
remove the brake unit.
(a) Inspect the tires and wheels as follows:
1) Do this task: Wheels Inspection (Wheel removed from the airplane) (AMM 32-45-03/601).
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747-400 MAINTENANCE MANUAL
2) Do this task: Tire Inspection (AMM 32-45-04/601). 3) Remove the seized brake unit do this task: Main landing gear brake removal (AMM 32-41-15/401)
NOTE: The brake assembly must be sent to the shop for
____ disassembly and a detailed inspection.
S 212-007
(6) Examine the wheel bearing seal (AMM 32-45-01/401).
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