S 212-010
(2)
Examine the leading edge fairing for fastener hole elongation, fastener tear-out, skin cracks, pulled fasteners, and fasteners which are not there.
S 212-071
(3)
Examine the body landing gear.
(a)
Examine the body landing gear tires for damage.
(b)
Examine the body landing gear wheels for cracks.
(c)
Examine the body landing gear shock strut upper and lower ends for signs of fluid leakage.
NOTE: A small amount of fluid on the body landing gear
____ shock strut inner cylinder is normal.
(d)
Examine these items for distortion, cracks, and/or other signs of damage: 1) Body Landing Gear Strut Doors 2) Body Landing Gear Strut Door Linkage
(e)
Examine these items for bolt distortion, component distortion, cracks, and other signs of damage: 1) Body Landing Gear Trunnion 2) Body Landing Gear Shock Strut Upper End 3) Body Landing Gear Drag Strut 4) Body Landing Gear Trunnion Attach Fittings 5) Body Landing Gear Truck Positioning Mechanisim 6) Body Landing Gear Truck Positioning Linkage 7) Body landing Gear Truck Beams
S 212-072
(4) Examine the wing landing gear.
(a)
Examine the wing landing gear tires for damage.
(b)
Examine the wing landing gear wheels for cracks.
(c)
Examine the wing landing gear shock strut upper and lower ends for signs of fluid leakage.
NOTE: A small amount of fluid on the wing landing gear
____ shock strut inner cylinder is normal.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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747-400
MAINTENANCE MANUAL
(d)
Examine these items for distortion, cracks, and/or other signs of damage: 1) Wing Landing Gear Shock Strut Doors 2) Wing Landing Gear Door Linkage
(e)
Examine these items for bolt distortion, component distortion, cracks, and other signs of damage: 1) Wing Landing Gear Trunnion 2) Wing Landing Gear Shock Strut Upper End 3) Wing Landing Gear Truck Positioning Mechanisim 4) Wing Landing Gear Truck Positioning Linkage 5) Wing Landing Gear Truck Beams
(f)
Examine the wing landing gear beam to rear spar attachment for signs of damage.
(g)
Examine the wing landing gear trunnion to rear spar attachment for signs of damage.
(h)
Examine the wing landing gear trunnion to landing gear beam attachment for signs of damage.
(i)
Do a check of the inside diameter of the fuse pins at the wing landing gear forward trunion to rear spar attachment.
S 212-073
(5) Examine the nose landing gear.
(a)
Examine the nose landing gear tires for damage.
(b)
Examine the nose landing gear wheels for cracks.
(c)
Examine the nose wheel well area for buckling, flaking paint, cracks, pulled fasteners, and fasteners which are not there.
NOTE: Look closely at the web of the nose wheel well in
____ the area of the trunnion and the drag strut support fittings.
(d) Examine the nose landing gear shock strut upper and lower ends for signs of fluid leakage.
NOTE: A small amount of fluid on the nose landing gear shock
____
strut inner cylinder is normal.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
05-51-39
ALL ú ú 01 Page 204 ú Jun 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(e) Examine the nose landing gear outer cylinder for distortion, cracks, and flaking paint.
S 212-024
(6)
Examine the lower fuselage structure aft of body station 2000 for signs of runway contact.
S 212-025
(7)
Examine the trailing edge aft flap drive rods, aft flap drive mechanism, and the fairing aft drive rod for distortion, cracks, or other signs of damage.
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