(2)
Openings
(3)
Loose paint (paint flakes)
(4)
Twisted parts (distortions)
(5)
Bent parts
(6)
Bent structure
(7)
Fastener holes that become larger or longer
(8)
Loose fasteners
(9)
Fasteners that have pulled out or are not there
(10)
Misalignment
(11)
Interference
(12)
Other signs of damage.
C. This inspection is provided by these two tasks:
(1)
Bird/Hail strike conditional inspection (in flight).
(2)
Hail strike on the ground conditional inspection.
D. For allowable hail damage, refer to the aerodynamic smoothness and investigation and cleanup of damage (SRM 51-10-00).
TASK 05-51-14-202-001
2. Bird/Hail Strike Conditional Inspection
________________________________________
A. References
(1)
27-81-00/201, Leading Edge Flap System
(2)
71 FAULT CODE INDEX - FIM
B. Procedure
S 492-016
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE LE FLAP SAFETY LOCKS. THE LE FLAPS CAN MOVE QUICKLY IF YOU DO NOT INSTALL THE SAFETY LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(1) Install the safety locks on the leading edge flaps
(Ref 27-81-00/201).
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747-400
MAINTENANCE MANUAL
S 212-014
(2) Do the inspections for the bird/hail strike that follow:
(a) Examine the wing, the nacelle strut, and the leading edge
fairing of the horizontal stabilizer and the vertical
stabilizer.
(b) Examine the pylon panels, the doors, and the structure.
(c) Examine the leading and the trailing edge structure of the
wing, the panels, and the doors.
NOTE: Examine all sides of the honeycomb panels for cracks,____
delamination, soft areas, and core damage.
(d) Examine the flap mechanism of the leading edge and the trailing
edge flaps and the track fairing links.
(e) Make sure the control surfaces move freely and there is no free
play or misalignment.
(f) Examine the skins.
(g) Examine the landing gear doors of the nose, wing and body
landing gear.
(h) Examine the pilot's window and the adjacent structure.
(i) Examine the forward passenger windows and the adjacent
structure.
NOTE: If the window panes do not align correctly in the center____
of the frame, cabin air can leak from the window.
(j) Examine the forward body nose section and the radome.
(k) Examine the internal sides and the external sides of the radome
for damage to the honeycomb core and soft spots.
(l) Examine the engines, the nose cowl and the inlet.
NOTE: If the engine shows signs of a bird/hail strike or____
suspected bird/hail strike on the nacelle, refer to the
applicable bird strike trouble shooting procedures (Ref
71 FAULT CODE INDEX - FIM).
S 092-015
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE
_______ LE FLAP SAFETY LOCKS. THE LE FLAPS CAN MOVE QUICKLY IF YOU DO NOT REMOVE THE SAFETY LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(3) Remove the safety locks from the leading edge flaps (Ref 27-81-00/201).
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747-400 MAINTENANCE MANUAL
TASK 05-51-14-212-018
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