(h)  
Repair the area if it is necessary after it is fully dry.

 TASK 05-51-15-112-004
 3. Alkaline Battery Contamination
 A. Standard Tools and Equipment
 (1)  
Rubber or plastic gloves

 (2)  
G02057 Goggles - Safety

 (3)  
Face shield

 (4)  
Aprons

 (5)  
Boots

 (6)  
Head gear

 B. Consumable Materials
 (1)  
Acetic acid

 (2)  
Household vinegar

 C. Procedure
 S 942-005
 CAUTION: DO NOT GET BATTERY ELECTROLYTE (ACID) IN YOUR MOUTH, YOUR EYES,
_______ OR ON YOUR SKIN. DO NOT BREATH THE FUMES FROM THE BATTERY ELECTROLYTE. PUT ON PROTECTIVE SPLASH GOGGLES AND GLOVES WHEN YOU CLEAN UP THE BATTERY ELECTROLYTE CONTAMINATION. BATTERY ELECTROLYTE IS A POISONOUS AND CAUSTIC MATERIAL WHICH CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  You must do the safety steps that follow when alkaline contamination or leakage is found.
 (a)  
Do not let the alkaline leakage move to adjacent areas which will not be cleaned.

 (b)  
In the battery areas, protect the equipment below the batteries with plastic sheets.

 (c)  
Make sure the area is vented.

 (d)  
Use protective covers to prevent contamination of adjacent areas with alkaline, or the solution to make the alkaline neutral.

 (e)  
You must always wear protective clothing when you clean-up alkaline contamination.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 S 112-006
 (2)  Do the steps that follow to clean-up the battery alkaline electrolyte contamination:
 (a)  
Soak up the excess fluids with a cloth.

 (b)  
Neutralize the contaminated area with a 5 percent acetic acid solution.

 NOTE: When acetic acid is not available, you can use household
____
 vinegar at its full strength.

 (c)  Apply the solution with a cloth, mop, brush, or sponge.
 1)  Make sure the solution goes into the contaminated faying surface joints.
 NOTE: A pressure application of the solution can be
____ necessary to flush the faying surface joints and some access areas fully.
 2) Apply the solution until the chemical reaction stops.
 NOTE: When the chemical reaction stops, the alkaline has
____
 become neutral.

 a)  Let the solution stay on the surface for 5 minutes more after the chemical reaction stops.
 (d)  
Remove the solution with a mop or sponge.

 1)  Discard the contaminated clean-up materials into a plastic container.

 (e)  
Flush the area with large quantities of clean water.

 NOTE: A pressure application of water to the solution can be
____ necessary to flush the faying surface joints and some access areas fully.
 1)  Rub the surface with a soft brush.
 (f)  
Do a test of the cleaned area with litmus paper.

 (g)  
Make the area dry with clean cloths.

 (h)  
Repair the area if it is necessary after it is fully dry.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 LANDING GEAR DOWN OVERSPEED CONDITION - MAINTENANCE PRACTICES
_____________________________________________________________ (CONDITIONAL INSPECTION)
________________________
 1.  General_______
 A.  One task is supplied in this procedure. The task is above maximum gear down placard speed conditional inspection.
 TASK 05-51-16-202-001
 2.  Above Maximum Gear Down Placard Speed Conditional Inspection____________________________________________________________
　
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