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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
WARNING: DO NOT SPRAY EXTINGUISHER OR COOLANT DIRECTLY ON THE
_______ INFLATED TIRE OR WHEEL. AN EXPLOSION CAN BE CAUSED AND INJURY TO PERSONS CAN OCCUR.
(c) After 1 hour, use fog or foam to cool the wheel and tire. Or, wait 2 to 3 hours for brakes to cool so they can be touched.
S 212-008
(2)
Examine the tires on the axles where all tires and wheel assemblies are inflated (Ref 32-45-03).
S 212-010
(3)
Examine the wheels on the axles where all tires and wheel assemblies are inflated (Ref 32-45-04).
S 212-009
(4)
Examine the brakes on the axles where all tires and wheel assemblies are inflated (Ref 32-41-10).
S 022-011
(5)
Remove the main gear tires and wheels on the axles where some of, or all of the tires and wheels are deflated. Do this also if the fuse plugs are melted. Do this step after the landing gear is cool and safe to go near (Ref 32-45-01).
S 212-012
(6)
Examine the axles where some or all of the tires have deflated or fuse plugs melted. Look for heat damage.
S 022-013
(7)
Remove the brakes (Ref 32-41-10).
S 022-014
(8)
Remove the antiskid transducers (Ref 32-42-06).
S 212-015
(9)
Examine the not painted outer diameters of the axles, axle bushings, and axle sleeves for heat damage. If heat damage is apparent, do the heat damage inspection procedure.
S 212-016
(10)
Examine the paint (green primer or light gray enamel) on the outer surfaces of the axle for discoloration or blisters. This includes the surfaces you can see through the holes and slots in the sleeves.
(a)
Green paint will change to a light brown or black color.
(b)
Light gray paint will change to a yellow color.
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05-51-14
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
(c) If the paint has discolored or blistered, examine the cadmium (or cadmium/titanium) plating. Look for a white oxide material, and blistered or melted plating. If the plating shows signs of heat damage, replace the components.
NOTE: Such damage can cause cadmium diffusion into the steel
____ substrate and is not found by the etch procedure.
(d)
If the plating shows signs of heat damage, do the heat damage inspection procedure.
(e)
If the paint shows only a small discoloration, more heat damage inspections can wait. Do the last part of the inspection after the ariplane gets back to the primary base. Do not land more than three times before you do this inspection.
S 292-017
(11) Examine the paint (green primer or light gray enamel) on the inner surfaces (bore) of the axle with a borescope. Use the borescope to a minimum depth of 16 inches. Look for discoloration or blistering.
(a)
Green paint will change to a light brown or black color.
(b)
Light gray paint will change to a yellow color.
(c)
If the plating shows signs of heat damage, do the heat damage inspection procedure.
(d)
If the paint shows only a small discoloration, more heat damage inspections can wait. Do the last part of the inspection when the airplane gets back to the primary base. Do not land more than three times before you do this inspection.
TASK 05-51-14-212-018
3. Heat Damage Inspection
______________________
A. General
(1) This inspection is used to find if the high strength steel that showed signs of heat damage, had changed. It will look for a change in the temper or heat treat properties.
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