S 012-190
(2)
Open the left and right fan cowl panels (AMM 71-11-04/201).
S 012-345
(3)
Open the left and right core cowl panels (AMM 71-11-06/201).
S 012-191
WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO OPEN THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
(4) Open the left and right thrust reversers (AMM 78-31-00/201).
S 042-193
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
_______ FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
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.
(5)
Do this task: "Extended Leading Edge Flaps Deactivation and Safety Locks Installation" (AMM 27-81-00/201).
(6)
Remove the upper wing leading edge cover 511CT/611CT.
S 012-194
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S 012-195
(7)
Remove access panel 462GL/472GL (AMM 54-62-00/201) on the right side of the strut that is below the wing leading edge at NSTA 249.
S 582-196
(8)
Level the airplane to a minimum of one-half degree
(AMM 08-00-00/201).
S 162-197
CAUTION:_______MAKE SURE YOU KEEP THE STRUT AREA CLEAN. TOOLS, LOOSE AND UNWANTED MATERIALS IN THE STRUT COMPARTMENTS CAN BLOCK THE REMOVAL OF THE FLUIDS THROUGH THE STRUT DRAINS. IF YOU DO NOT REMOVE THE UNWANTED MATERIALS, YOU CAN CAUSE DAMAGE TO THE STRUT.
(9)
Make sure you remove all unwanted materials (spilled sealant, fasteners, tie wires, etc.) from the upper spar surfaces and the upper spar forward drain inlet (NSTA 212).
S 862-198
(10)
Open the aft fairing panels (AMM 54-62-00/201).
S 162-094
(11)
Make sure you remove all unwanted materials (spilled sealant, fasteners, tie wires, etc.) from the aft bulkhead and aft fairing panels.
S 042-096
(12)
Close and latch the aft fairing panels (AMM 54-62-00/201).
F. Aft Tube Leak Test T2 - Inboard (Figs. 203 and 204)
S 792-199
(1) Apply water to the upper spar surface as follows:
(a) Put an empty container below the outlet end of the midspar center drain.
NOTE: The drain outlet is located on the aft edge of the lower
____ pan assembly on the right aft fairing panel (approximately NSTA 331).
(b) With a funnel and hose, apply water to the top surface of the upper spar (forward of NSTA 241), let the water enter both the upper spar drain inlets. 1) Apply 128 fluid ounces (1 gallon or 3785 ml) of water, in
3.5 to 4.5 minutes.
NOTE: This is approximately 32 fluid ounces (1/4 gallon or
____ 950 ml) per minute for 4 minutes.
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747-400 MAINTENANCE MANUAL
(c) Look through access panel 462GL/472GL to make sure that water flows freely from both the upper spar drain outlets.
S 792-200
(2) Make sure there are no leaks as follows:
(a)
Make sure you do not see any water leaks at the tube connections.
(b)
After three minutes, make sure that a minimum of 115 fluid ounces (3401 ml) of water has collected in the container.
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