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747-400
MAINTENANCE MANUAL
(i)
If one or more of the conditions that follow occurred; remove, disassembly, and examine all parts of the shock strut (AMM 32-11-01/601). 1) The shock strut pressures were sufficiently low to cause
damage. 2) The hydraulic fluid levels were sufficiently low to cause damage. 3) You found damage to one or more of the parts during your inspection of the landing gear.
(j)
Make sure the wing landing gear retracts and extends correctly (AMM 32-32-00/501).
(k)
Lower the airplane off of the jacks (AMM 07-11-01/201).
S 212-007
(3) Do the inspection of the nose landing gear and support structure (AMM 32-21-01/601).
(a)
Make sure the shock strut pressures are normal and the hydraulic fluids are at the correct levels (AMM 12-15-05/301).
(b)
Lift the nose of the airplane with the jacks
(AMM 07-11-01/201).
(c)
If you found tire damage in Phase 1, remove and examine the wheel structure (AMM 32-45-03/601).
(d)
Examine all structural components of the nose landing gear and carefully examine the components that follow: 1) the shock strut 2) the torsion links 3) the drag strut 4) the lock links 5) the side braces 6) the lower tripod brace 7) the upper tripod brace 8) the tow fitting 9) the axle 10) the steering mechanism.
(e)
Examine all of the bolts and fuse pins.
(f)
Examine the wheel well area and carefully examine the parts that follow: 1) the web (the left and right sidewalls) 2) the aft bulkhead 3) the trunnion attachments 4) the drag strut attachments.
(g)
If one or more of the conditions that follow occurred; remove, disassemble, and examine all parts of the shock strut (AMM 32-21-01/401). 1) The shock strut pressures were sufficiently low to cause
damage.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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747-400 MAINTENANCE MANUAL
2) The hydraulic fluid levels were sufficiently low to cause damage. 3) You found damage to one or more of the parts during your inspection of the landing gear.
(h)
Make sure the steering system is adjusted and operates correctly (AMM 32-51-00/501).
(i)
Make sure the nose landing gear retracts and extends correctly (AMM 32-34-00/501).
(j)
Lower the nose of the airplane from the jacks (AMM 07-11-01/201).
S 212-008
(4) Do the inspection of the fuselage.
NOTE: If you find external damage to the fuselage, always examine
____
the adjacent internal structure.
(a) Examine the lower fuselage structure.
NOTE: Keel beam vertical web wrinkles are normal.
____
1) Examine carefully the area below the body floor beams, immediately aft of the wing center section.
NOTE: Look from Body Stations 1480 to 1680.
____
(b)
Examine the wing-to-fuselage joints at Body Stations 1000 to 1241, and wheel well bulkheads and sidewalls.
(c)
Examine the bulkhead at Body Station 400 and fuselage structure immediately outboard of the nose landing gear wheel well.
NOTE: The inspection can be done from the aft side of the
____ bulkhead at body section 400 in the main electrical/electronics equipment center.
(d)
Examine the area of the main landing gear wheel wells.
(e)
Examine the fuselage skin attachments above the landing gear beam (Body Station 1350).
(f)
Examine the horizontal deck located aft of Body Station 1350, WL 152 at the side of the body.
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