(c)
Inspect all tie rods of affected zones for evidence of buckling or rupture. If any defect is found, replace as necessary.
(d)
Examine lavatory tie rod attachments for damage consisting of breakage, cracks, and deformation. Inspect the tie rods for evidence of buckling or rupture.
(e)
Examine the lavatory floor fittings for damage consisting of breakage, cracks, and deformation.
(f)
Examine galley tie rod attachments for damage consisting of breakage, cracks, and deformation. Inspect the tie rods for evidence of buckling or rupture.
(g)
Examine the galley floor fittings for damage consisting of breakage, cracks, and deformation.
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747-400 MAINTENANCE MANUAL
(h)
Examine closet tie rod attachments for damage consisting of breakage, cracks, and deformation. Inspect the tie rods for evidence of buckling or rupture.
(i)
Examine the closet floor fittings for damage consisting of breakage, cracks, and deformation.
(j)
Examine the cabin overhead electronic racks for damage consisting of breakage, cracks, deformation, and missing or broken fasteners.
NOTE: For example, if installed, the E-42 SATCOM rack.
____
F. Put the Airplane back to Its Usual Condition
S 412-074
(1)
Install the components you removed or install replacement components.
S 442-075
(2)
Do the activation procedure for the trailing edge flap system (AMM 27-51-00/201).
S 442-076
(3)
Do the activation procedure for the leading edge flap system (AMM 27-81-00/201).
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747-400 MAINTENANCE MANUAL
FLAP DOWN OVERSPEED CONDITION - MAINTENANCE PRACTICES
_____________________________________________________ (CONDITIONAL INSPECTION)
________________________
1. General
_______
A. When the trailing edge flaps are lowered at speeds more than the placard speeds permit, the flap components and related structures must be examined for damage and conditions defined in this procedure.
NOTE: The Phase I inspection for the TE flaps is not necessary for flap
____ position 1 because the TE flaps are not are not extended.
B. When the leading edge flaps are lowered at speeds more than the flaps 1 placard for flap detents 1, or more than the flaps 5 placard for flap detents 5, 10, and 20 or more than flaps 25 placard for flap detents 25 and 30, the flaps components must be examined for damage and conditions defined in this procedure.
C. The conditional inspection is divided into two phases, Phase I and Phase II, and should be accomplished as follows:
(1)
If the overspeed was less than 15 knots, do the Phase I inspection within 100 flight hours of the overspeed indication.
(2)
If damage is found in the Phase I inspection, do the Phase II inspection before the next flight.
(3)
If the overspeed was 15 knots or more, do both the Phase I and Phase II inspections before the next flight.
D. When the conditional inspection tells you to "examine" a component, look for these conditions (replace or repair the components, if necessary):
(1)
Cracks
(2)
Pulled apart structure
(3)
Loose paint (paint flakes)
(4)
Twisted parts (distortion)
(5)
Bent components
(6)
Fasteners holes that became larger or longer
(7)
Loose fasteners
(8)
Fasteners that have pulled out or are gone
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