STRUT.
 (1)  
Make sure you remove all unwanted materials from the strut cavities.

 S 412-227

 (2)  
Install these access panels (AMM 54-62-00/201):

 (a)  
Access panel 462AL/472AL on the left side of the strut at NSTA 164.

 (b)  
Access panel 462EL/472EL on the left side of the strut at NSTA 217.

 (c)  
Access panel 462CL/472CL on the left side of the strut at NSTA 186.

 S 442-228
 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 REMOVE THE
_______ LE FLAP SAFETY LOCK. THE LE FLAPS CAN MOVE QUICKLY IF YOU DO NOT DO THE STEPS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (3)  Do this task: "Safety Locks Removal and Extended Leading Edge Flaps Activation" (AMM 27-81-00/201).
 S 412-229 WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO CLOSE THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
 (4)  Close the left and right thrust reversers (AMM 78-31-00/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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MAINTENANCE MANUAL

 S 412-369
 (5)
Close the left and right core cowl panels (AMM 71-11-06/201).

 S 412-230

 (6)
Close the left and right fan cowl panels (AMM 71-11-04/201).

 S 442-370

 (7)  
Do the activation procedure for the thrust reverser (AMM 78-31-00/201).

 TASK 54-53-00-702-308
 11. Inboard Strut, Forward Upper Spar - Leak Check (S2)
___________________________________________________
 A. General
 (1)  This task gives instuctions on how to do a leak check (S2) of the forward upper spar structures on the inboard engine strut.
 B. Equipment
 (1)  
Water source - low pressure, can spray up to 2 quarts (1.9 liters) per minute

 (2)  
Container - 5 gallon (19 liter) capacity, can collect and measure water to within 1 fluid ounce (30 ml) (measure can be done in smaller containers)

 (3)  
Funnel - long necked

 C. References
 (1)  
AMM 08-00-00/201, Leveling and Weighing

 (2)  
AMM 27-81-00/201, Leading Edge Flaps

 (3)  
AMM 51-31-01/201, Seals and Sealing

 (4)  
54-62-00/201, Nacelle Strut Access Panels

 (5)  
AMM 71-11-04/201, Fan Cowl Panels

 (6)  
AMM 71-11-06/201, Core Cowl Panels

 (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 462AL Core Cowl to Strut Access Door - Engine 2 471B No. 3 Forward Fairing - Engine 3 472AL Core Cowl to Strut Access Door - Engine 3

 E. Prepare for the Leak Check
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400 MAINTENANCE MANUAL
 S 042-348
 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).
　
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