(3)
Install the applicable access panel 540AB, 640AB, (Ref. TASK 57-27-11-400-001).
Subtask 57-27-12-650-051
B. Refuel (Ref. TASK 12-11-28-650-003), defuel (Ref. TASK 28-25-00-650-001), or transfer fuel (Ref. TASK 28-25-00-869-001) as necessary.
Subtask 57-27-12-941-053
C. Removal of Equipment
(1)
Remove the warning notice(s).
(2)
Remove the TOOL-ZERO LOCKING, FLAP SLAT CTL LEVER (98D27803500001) from the flap/slat control lever.
(3)
Remove the safety barriers.
(4)
Remove the access platform(s).
(5)
Remove the ground support and maintenance equipment, the special and standard tools and all other items.
MISCELLANEOUS (EG : DRAINS) - DESCRIPTION AND OPERATION
_______________________________________________________
R 1. General
_______ R (Ref. Fig. 001, 002)
There are drainholes in the lower surface of the wing, to drain the leading edge and other structures.
Attached to the wingbox are:
-
the jacking point
-
the drip fence
-
the air dam.
2. Component Description
_____________________
A. Drainholes
There are two sets of drainholes in the lower wing surface to drain
liquid that can collect inside the leading edge. The drainholes are:
-
in some of the leading edge access panels
-
in the lower wing skin forward of the front spar.
The leading-edge slat tracks go through holes in the front spar. Track cans are attached to the front spar and isolate the tracks from the wing fuel tanks. Liquid from the slat tracks collects in the cans and then flows down drain-pipes to drain-holes in the bottom skin. At track 4 in both wings there is a dry bay and no cans. Liquid from these tracks falls to the bottom skin and then flows out from the drain-holes.
Single drainholes drain liquid from other areas of the wing structure.
They are:
-in the wing tip structure at the leading edge
-between the two outer manholes
-in the access panels 574BB(674BB) and 574AB(674AB) on each side of the No. 2 flap track fairing.
B. Jacking point
The jacking point fitting is at RIB9. It is attached to the aft face of the rear spar and to the upper surface of the bottom skin. The fitting is machined from aluminum alloy and transmits the jacking loads into the wing structure (Ref. 07-11-00).
Outer-Wing Drains
Figure 001
1EFF : ALL 1 57-29-00 Page 2
1 1 Feb 01/98
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R Slat-track Cans and Dry Bay Drains Figure 002
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R **ON A/C 301-399,
R (Ref. Fig. 003)
R **ON A/C ALL
C. Drip Fence
The drip fence is installed on the bottom skin at RIB22, inboard of the NACA intake access panel 550AB(660AB) (Ref. 57-27-00). The drip fence is an aluminum alloy angle. It prevents fuel which has come out of the NACA intake from flowing down the wing surface to the pylon area. The angled surface stops the flow of fuel and causes it to fall to the ground.
R **ON A/C 301-399,
R R R R R D. Air Dam The air dam is machined from two aluminum alloy castings and is located on the bottom skin in the engine pylon Z400. The air dam forms the aft boundary of the environment protection system (Ref. 36-14-00).
R Drip Fence and Air Dam
R Figure 003
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1 1 May 01/04
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MISCELLANEOUS (EG : DRAINS) - INSPECTION/CHECK______________________________________________
R TASK 57-29-00-210-002
R Check Drain Holes and Hoses of Outer Wing for Clogging
R WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING_______
R GEAR.
R WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU_______
R START A TASK ON OR NEAR:
R - THE FLIGHT CONTROLS
R - THE FLIGHT CONTROL SURFACES
R - THE LANDING GEAR AND THE RELATED DOORS
R - COMPONENTS THAT MOVE.
R 1. Reason for the Job__________________
R Refer to the MPD TASK: 572900-01
R 2. Job Set-up Information______________________
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