S 792-242

 (3)  
Make sure you see no water leakage through the bulkhead vapor barrier at NSTA 225.

 S 792-243

 (4)  
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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747-400 MAINTENANCE MANUAL
 S 392-244
 (5)  If you found water leaks during the test, do these steps:
 (a)  
If the leak is from a tube, do the procedure to repair the tube (AMM 20-11-05/801).

 (b)  
If the leak is from a seal, do the procedure to seal the applicable area of the leak (AMM 51-31-01/201).

 (c)  
After you repair the leak, do the applicable leak test again.

 S 362-245
 (6)  If you did not collect the correct amount of water and cannot find leaks, do these steps:
 (a)  
Do the task to clear the applicable strut drain.

 (b)  
If you cannot remove the blockage with air, use a thin wire to clear the applicable drain tube.

 (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.
 S 162-246
 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.

 (2)  
Install the upper wing leading edge cover 511CT/611CT.

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

 S 412-247
 S 412-248
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747-400 MAINTENANCE MANUAL
 S 442-249
 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.
 (4)  Do this task: "Safety Locks Removal and Extended Leading Edge Flaps Activation" (AMM 27-81-00/201).
 S 412-251
 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.
 (5)
Close the left and right thrust reversers (AMM 78-31-00/201).

 S 412-389

 (6)
Close the left and right core cowl panels (AMM 71-11-06/201).

 S 412-252

 (7)
Close the left and right fan cowl panels (AMM 71-11-04/201).

 S 442-373

 (8)  
Do the activation procedure for the thrust reverser
 (AMM 78-31-00/201).

 TASK 54-53-00-702-253
 13. Inboard Strut, Aft Midspar Structure - Leak Check (S4)______________________________________________________
 A. General
 (1)  This task gives instuctions on how to do a leak check (S4) of the aft midspar structure on the inboard strut.
 B. Equipment
 (1)  Water source - low pressure, can spray up to 2 quarts (1.9 liters) per minute
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