757
MAINTENANCE MANUAL
(c) 757-200 AIRPLANES;
Examine the fuselage, section 46 lower lobe for distortion,
paint that has flaked, and for cracks. Also look for fasteners
that have pulled out or are not there.
NOTE: A light skin wrinkling/buckling of the lower aft body____
(between stations 1370 and 1470, below stringer 20L) is
a usual condition when the airplane is on its landing
gear. But, an apparent increase in the magnitude of
these buckling patterns is cause for more internal
inspections. This is shown by the formation of sharp
creases that usually show between the fasteners.
(d) Examine the complete empennage, section 48 for distortion,
paint that has flaked, and for cracks. Also look for fasteners
that have pulled out or are not there.
(e) If any external damage is found, do the step that follows:
1) Examine all of the internal primary structure in the
damaged areas. Look for distortion, paint that is flaked,
for cracks, and for fasteners that have pulled out or are
not there. Wrinkles in the keel beam vertical web are
normal.
(f) Examine all of the internal structure of the fuselage, section
48 that you can get access to. Look at the structure from the
rear pressure bulkhead to the aft end of the airplane. Look
for distortions, paint that has flaked, and cracks. Also look
for fasteners that have pulled out or are not there.
1) Look at areas that follow:
a) The aft fuselage bulkheads
b) The fin attach fittings
c) The horizontal stabilizer center section
d) The stabilizer hinge fittings
e) The stabilizer jackscrew-mechanism mount fittings and
support structure
2) Look at the jackscrew and hinges for signs of binding.
3) Inspect the horizontal stabilizer-to-body rubstrips. Look
for signs of movement of the structure against the
rubstrips. Such movement shows distortion of the
structure.
(g) Examine the external surfaces around the top and bottom
wing-to-body attachment. This includes the wing to body
fairing, and the rear spar web. Look for distortion, cracks,
badly chafed areas, and fasteners that have pulled out or are
not there.
(h) If external damage is seen, examine the body-to-wing joints,
and the landing gear beam-to-body joints. Also examine the
upper-wing skin splice for distortion, paint that has flaked,
cracks, and for fasteners that have pulled out or are not
there.
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05-51-04
ALL ú ú 01 Page 203 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
WARNING: DO NOT ENTER THE WING LEADING EDGE AND TRAILING EDGE AREAS
_______ BEFORE YOU INSTALL SAFETY LOCKS. THE LEADING EDGE SLAT AND TRAILING EDGE FLAP SAFETY LOCK PROCEDURES ARE FOUND IN AMM 27-81-00 AND AMM 27-51-00. THIS WILL PREVENT INJURY TO PERSONS FROM ACCIDENTAL FLAP/SLAT OPERATION.
(i) Examine the external surfaces of the wing at the skin splices. Look for misalignment and for rivets that have pulled out or are not there. 1) Examine the external surface of the top of the wing
trailing edge for buckles in the skin. 2) If external damage is found, do the step that follows:
a) Examine all of the internal primary structure, in the damaged area, that you can get to. Look for distortion, skin that has buckled, cracked, and paint that has flaked. Also look for fasteners that have pulled out or are not there.
(j) Examine the wing control surfaces and the attachments at the front and rear spars. Look for cracks and for rivets that are pulled out or are not there. Also look for signs of binding. 1) If external damage is found, do the steps that follow:
a) Examine the spars for distortion, buckling, cracks, and paint that has flaked. Also look for fasteners that have pulled out or are not there.
b) Examine all of the internal primary structure in the damaged area you can get to. Look for distortion, buckling, cracks, and paint that has flaked. Also look for fasteners that have pulled out or are not there.
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