(c)  
Continue to remove the blockage in the tube and do the leak test again until you collect the correct amount of water.

 G.  If you will not do more leak checks at this time, put the airplane back to its usual condition.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400 MAINTENANCE MANUAL
 S 162-059
 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.
 (1)  
Make sure you remove all unwanted materials from the strut cavities.

 S 412-060

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

 (a)  
Access panel 452AL/482AL on the left side of the strut at NSTA 164.

 (b)  
Access panel 452EL/482EL on the left side of the strut at NSTA 217.

 (c)  
Access panel 452CL/482CL on the left side of the strut at NSTA 186.

 S 442-061
 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 412-063 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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747-400
MAINTENANCE MANUAL

 S 412-353
 (5)
Close the left and right core cowl panels (AMM 71-11-06/201).

 S 412-064

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

 S 442-354

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

 TASK 54-53-00-702-065
 3. Outboard Strut, Aft Tube - Leak Check (T2)
__________________________________________
 A. General
 (1)  This task gives instuctions on how to do a leak check (T2) of the aft drain tube on the outboard engine strut. Water will be applied at two different locations, the upper spar surface and the closure spar inlet.
 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)  
AMM 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
 451 Nacelle Strut 1 - Forward Fairing
 452 Nacelle Strut 1 - Torque Box
 481 Nacelle Strut 4 - Forward Fairing
　
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