inspected. 2) Access the fuse pin that is to be inspected. a) Remove all strut panels and doors, and open the nacelle cowlings (AMM 54-52-01/601).
3) Pull the fuse pin out 0.5 inches (0.127 mm). If the fuse pin is free to slide in and out of the lugs, no damage exists.
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747-400 MAINTENANCE MANUAL
B. Inspection Guidelines
S 212-097
(1) When the conditional inspection tells you to "examine" a component or area, look for these conditions (replace or repair components, if necessary).
(a)
Cracks
(b)
Creases or cracks in the skin or web
(c)
Skin wrinkling that crosses a line of fasteners
(d)
Pulled apart structure
(e)
Loose paint (paint flakes)
(f)
Twisted parts (distortion)
(g)
Bent components
(h)
Fastener holes that have become larger or longer
(i)
Loose fasteners
(j)
Fasteners that have pulled out or are gone
(k)
Delaminations
(l)
Misalignment
(m)
Interference
(n)
Other signs of damage.
TASK 05-51-05-212-081
4. Phase I Inspection
__________________
A. References
(1)
AMM 06-09-09/201, Nacelle and Engine-to-Wing Fairing Access Doors and Panels
(2)
AMM 71-00-02/401, Power Plant
B. Wing and Body Gear Inspection
S 212-065
(1) Examine the areas of the wing and body landing gear that follow:
(a)
The tires
(b)
The wheels
(c)
The shock struts at the top and bottom ends for signs of fluid leakage
NOTE: A small quantity of hydraulic fluid on the inner
____ cylinder is satisfactory.
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(d)
The strut doors and linkage
(e)
The trunnion and shock strut upper end
(f)
The drag strut and trunnion attach fittings of the body landing gear
(g)
The attach fitting of the landing gear beam at the rear spar
(h)
The connection of the landing gear trunnion to the rear spar attachment
(i)
The connection of the landing gear trunnion to the landing gear beam
(j)
The inner diameter of the fuse pins at the connection of the trunnion to the rear spar
(k)
The truck positioning mechanism and linkage
(l)
The truck beams.
C. Nose Landing Gear Inspection
S 212-066
(1) Examine the areas of the nose landing gear that follow:
(a)
The tires
(b)
The wheel well
NOTE: Make sure you look carefully in the area near the
____ trunnion and the support fitting of the drag strut.
(c)
The wheels
(d)
The shock strut at the top and bottom ends for signs of hydraulic fluid leakage
NOTE: A small quantity of hydraulic fluid on the inner
____
cylinder is satisfactory.
(e) The outer cylinder.
D. Fuselage and Wing Inspection
S 212-067
(1) Examine the fuselage and wing areas.
(a) Examine the Nacelles and Nacelle-Struts components that follow:
NOTE: Do a general visual inspection for obvious damage.
____
NOTE: The inspection of the upper link area and the mid-spar
____ attachment area can be deferred for up to 150 flights (cycles) if no damage is found in the other parts of the inspection.
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