(11)
Drain any fuel that remains from the wing-tank inner-cell and the vent surge tank (Ref. TASK 28-25-00-650-003)
(12)
The wing-tank outer-cell must be full of fuel for a minimum of 30 minutes before the test.
Subtask 28-11-00-010-068
C. Get Access WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS ARE
_______ CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE.
(1)
Extend the flaps fully (Ref. TASK 27-50-00-866-008).
(2)
Extend the No. 3, 4 and 5 spoilers fully (Ref. TASK 27-60-00-866-002).
(3)
Put an adjustable access platform below the applicable zone 575(675).
(4)
Put an adjustable access platform below the applicable zone 522(622).
(5)
Put an adjustable access platform below the applicable access panel 540JB(640JB).
(6)
Put an adjustable access platform below the applicable access panel 550AB(650AB).
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(7)
Remove the applicable access panels (Ref. TASK 28-10-00-910-002), (Ref. TASK 28-12-47-000-001), (Ref. TASK 57-27-11-000-002): - on the left wing 550AB, 540JB - on the right wing 650AB, 640JB.
(8)
Remove the applicable leading edge access panel:
- on the left wing 522KB, 522LB, 522NB, 522QB
- on the right wing 622KB, 622LB, 622NB, 622QB.
(9)
Remove the applicable trailing edge access panel (Ref. TASK 57-51-37-000-004): - on the left wing 575EB, 575FB, 575GB, 575HB - on the right wing 675EB, 675FB, 675GB, 675HB.
4. Procedure
_________
Subtask 28-11-00-790-062
A. Visual Inspection
(1)
Look for signs of fuel leakage in these areas:
-tank seals and sealant
-structure, brackets and clamps
-fuel pipelines, couplings, bonded items, brackets and clamps.
(2)
Talcum Powder Procedure
WARNING : USE A PROTECTIVE EYE SHIELD/GOGGLES WHEN YOU USE COMPRESSED
_______ AIR. DEBRIS AND/OR HIGH PRESSURE AIR CAN DAMAGE YOUR EYES.
CAUTION : USE THE TALCUM POWDER PROCEDURE ONLY ON THE EXTERNAL
_______
SURFACES OF THE FUEL TANKS.
(a)
Dry the area of the possible leak with a MISCELLANEOUS (Material No. 19-003).
(b)
Dry the area fully with a low pressure, dry and filtered air supply.
(c)
Apply MISCELLANEOUS (Material No. 19-004) to the area with a soft brush.
(d)
Monitor the area for a change in color of the talcum powder. This will show the location of a fuel leak and the rate of the leakage.
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B. Preparation for Test
(Ref. Fig. 501/TASK 28-11-00-991-010)
(1)
Connect the electrical connector (1) to the related
intercell-transfer-valve actuator (2).
(2)
Install the applicable access panels (Ref. TASK 28-12-47-400-001) (Ref. TASK 57-27-11-400-002): - on the left wing 550AB, 540JB - on the right wing 650AB, 640JB.
5. Close-up
________ Subtask 28-11-00-860-060
A. Aircraft Configuration WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS ARE
_______ CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE.
(1)
Fully retract the flaps (Ref. TASK 27-50-00-866-009).
(2)
Retract the No. 3, 4 and 5 spoilers (Ref. TASK 27-60-00-866-002).
(3)
On the spoiler servo-control, make sure that the pointer on the hex. head is opposite the letter 'O' on the housing.
Subtask 28-11-00-410-066
B. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Install the applicable leading edge access panels:
- on the left wing install 522KB, 522LB, 522NB, 522QB
- on the right wing install 622KB, 622LB, 622NB, 622QB.
(3)
Install the applicable trailing edge access panels (Ref. TASK 57-51-37-400-004): - on the left wing install 575DB, 575EB, 575FB, 575GB, 575HB - on the right wing install 675DB, 675EB, 675FB, 675GB, 675HB.
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