757 MAINTENANCE MANUAL
FLAP/SLAT 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.
B. When the leading edge slats are lowered at speeds more than the flaps 1 placard for flap detents 1, 5, 15, and 20, or more than the flaps 25 placard for flap detents 25 and 30, the slat components must be examined for damage and conditions defined in this procedure.
C. You must do the conditional inspection as follows:
(1)
If the overspeed was less than 15 knots, do this inspection within 100 flight hours of the overspeed indication.
(2)
If the overspeed was 15 knots or more, do this inspection before the next flight.
TASK 05-51-08-212-001
2. Flap/Slat Down Overspeed Condition, Conditional Inspection__________________________________________________________
A. References
(1)
AMM 27-51-00/201, Trailing Edge Flap System
(2)
AMM 27-81-00/201, Leading Edge Slat System
B. Trailing Edge Flap Areas
S 862-002
WARNING: DO THE DEACTIVATION PROCEDURE FOR THE FLAP ACTUATION SYSTEM.
_______ INJURY TO A PERSON OR DAMAGE TO EQUIPMENT CAN OCCUR IF THE FLAPS MOVE. THE FLAP ACTUATION SYSTEM MUST NOT BE OPERATED DURING THIS INSPECTION. FAILURE TO OBEY CAN CAUSE INJURY TO PERSONS.
(1)
Do the deactivation procedure for the trailing edge flap system (AMM 27-51-00).
S 212-003
(2)
Examine the trailing edge flap components and support structure as follows:
(a)
Examine the external skin of all flaps for distortion. Also look for fasteners that have pulled out or are not there.
(b)
Examine the flap carriages and tracks for cracks and distortion. Also examine the joints for binding, cracks, distortion or hole elongation.
(c)
Examine all flap track support fittings and wing spar and skin surfaces that are near the flap track support fittings. Look for cracks, distortion, and for fasteners that have pulled out or are not there.
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A
757 MAINTENANCE MANUAL
(d) If the flaps were lowered at speeds more than 15 knots above the placard speed do the procedure that follows: 1) Remove all of the trailing edge flap support-track
fuse-pins. Examine them for cracks or distortion.
C. Leading Edge Slat Areas
S 862-004
WARNING: DO THE DEACTIVATION PROCEDURE FOR THE SLAT ACTUATION SYSTEM.
_______ INJURY TO A PERSON OR DAMAGE TO EQUIPMENT CAN OCCUR IF THE SLATS MOVE. THE SLAT ACTUATION SYSTEM MUST NOT BE OPERATED DURING THIS INSPECTION. FAILURE TO OBEY CAN CAUSE INJURY TO PERSONS.
(1)
Do the deactivation procedure for the leading edge slat system (AMM 27-81-00).
S 212-005
(2)
Examine the leading edge slat components and support structure.
(a)
Examine the external skin of all slats for distortion. Also look for fasteners that have pulled out or are not there.
(b)
Examine all slat main tracks, auxiliary arms, rack and pinion drive and the related attachment structure. Look for cracks, distortion, or hole elongation.
(c)
Examine all slat track support rollers. Also examine their attachment bolts and wing inspar surfaces that are near the slat support roller fixed ribs. Look for cracks, distortion, hole elongation, and for fasteners that have pulled out or are not there.
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05-51-08
ALL ú ú 01 Page 202 ú Jan 20/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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