Main Gear Wheel Well
Figure 2

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 LANDING GEAR WHEEL WELL - INSPECTION/CHECK
__________________________________________
 1.  General_______
 A.  This procedure contains one task. This task is the inspection of the wheel wells for the main and nose landing gears.
 TASK 53-15-01-206-001
 2.  Examine the Wheel Wells_______________________
 A.  References
 (1)  32-00-30/201, Landing Gear Door Locks
 B.  Access
 (1)  Location Zone
 113 Nose Landing Gear Wheel Well, Left
 114 Nose Landing Gear Wheel Well, Right
 135 Wing Landing Gear Wheel Well, Left
 136 Wing Landing Gear Wheel Well, Right
 137 Body Landing Gear Wheel Well, Left
 138 Body Landing Gear Wheel Well, Right

 C.  Examine the Wheel Wells for the Main Landing Gear
 S 496-002
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  
Install the door locks for the main landing gear (Ref 32-00-30/201).

 S 216-003

 (2)  
Do the steps that follow to examine the wheel wells.

 (a)  
Examine the bulkhead web and stiffeners for cracks, corrosion, and loose fasteners.

 (b)  
Examine the main attach forgings for cracks and corrosion.

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747-400 MAINTENANCE MANUAL
 (c)  
Examine the rear spar web and stiffeners in the center of the wing for cracks, corrosion and loose fasteners.

 (d)  
Examine the part of the vertical pressure beams that attach to the deck structure for cracks and corrosion.

 (e)  
Examine the rear spar and stiffeners of the wing for cracks, corrosion, and loose fasteners.

 (f)  
Examine the main forgings for cracks and corrosion, specially in the area of the attach fittings and trunnions.

 (g)  
Examine the door hinges for cracks, corrosion, and loose fasteners.

 (h)  
Examine the support fittings for the door actuator for cracks, corrosion, and loose fasteners.

 (i)  
Examine the attach rod fittings for the door for cracks, corrosion, and loose fasteners.

 (j)  
Examine the pressure web at the top of wheel wells for cracks, corrosion, and loose rivets.

 (k)  
Examine the keel beam chords, webs, and stiffeners for cracks, corrosion, distortion, and loose fasteners.

 NOTE: The vertical web of the keel beam, found aft of
____ station 1232, can contain wrinkles. These wrinkles do not decrease the structural capacity of the keel beam.
 (l)  Examine the landing gear beam for cracks, corrosion, and loose fasteners.
 S 096-010
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE
_______ DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (3)  Remove the door locks for the main landing gear (Ref 32-00-30/201).
 D. Examine the Wheel Well for the Nose Landing Gear
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