(7)  
AMM 78-31-00/201, Thrust Reverser System

 D. Access
 (1)  
Location Zone
 461 Nacelle Strut 2 - Forward Fairing
 462 Nacelle Strut 2 - Torque Box
 471 Nacelle Strut 3 - Forward Fairing
 472 Nacelle Strut 3 - Torque Box

 (2)  
Access Panel
 461B No.3 Forward Fairing - Engine 2
 511CT Wing Leading Edge Cover - Engine 2
 471B No. 3 Forward Fairing - Engine 3
 611CT Wing Leading Edge Cover - Engine 3

 E. Prepare for the Leak Check
 S 042-350
 WARNING: DO THE DEACTIVATION PROCEDURE TO PREVENT THE OPERATION OF THE
_______ THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  
Do the deactivation procedure for the thrust reverser for ground maintenance (AMM 78-31-00/201).

 (2)  
Open the left and right fan cowl panels (AMM 71-11-04/201).

 (3)  
Open the left and right core cowl panels (AMM 71-11-06/201).

 S 012-232
 S 012-351
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 S 012-233
 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 042-235
 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)  
Open the upper wing leading edge cover 511CT/611CT.

 (7)  
Remove the strut No. 3 forward fairing 461B/471B.

 S 582-238

 (8)  
Level the airplane to a minimum of one-half degree (AMM 08-00-00/201).

 S 012-236
 S 012-237
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 162-239
 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 midspar upper surface and the midspard forward drain inlet (NSTA 212).
 F. Upper Spar Inlet Leak Check S3 - Inboard (Figs. 203 and 204)
 S 942-240
 (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 upper spar (forward of NSTA 241), let the water enter the NSTA 225 bulkhead vapor barrier and both the upper spar drain inlets. 1) Apply 1 gallon (128 fl oz 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.
 S 792-241
 (2)  
　
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