(b)  
Remove the cap or plug from the raceway drain fitting, and let the water drain into the container.

 (c)  
Measure the water that leaked from the raceway drain into the container.

 (d)  
A maximum of 4 ounces (120 ml) of water is permitted.

 NOTE: It is permitted for 2 ounces (60 ml) of water to leak
____ into the fully enclosed cavity of the strut system raceway for each gallon (128 ounces) of applied water. If 2 gallons (256 ounces or 720 ml) was applied, 4 ounces (60 ml) of water leakage is permitted.
 (e)  
Connect the raceway drain fitting to the drain line just below the raceway.

 (f)  
Make sure there is no puddling of water in the strut area.

 NOTE: Puddling is defined as more than 0.5 fluid ounce (15 ml)
____ of water in a continuous pool.
 S 362-109
 (6)  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 362-110
 (7)  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.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 S 162-111
 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 412-112

 (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 442-113
 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 412-115 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 412-357
 (5)
Close the left and right core cowl panels (AMM 71-11-06/201).

 S 412-116
　
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