737-300 400 500 AMM 飞机维护手册 TIME LIMITS/MAINTENANCE CHE(60)

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 E.  Containers of acid concentrates or acid based chemicals may be part of a cargo and may be broken during loading or unloading. Spillage from such sources are usually larger in scale than spills previously mentioned. It is , therefore, advisable that the acid spillage be neutralized as soon as possible.
 F.  Operators should also be cognizant of the fact that acids may deteriorate nonmetallic materials such as fabrics, wood, leather, etc.
 TASK 05-51-58-002-001
 2.  Corrosion Removal After Acid Spills___________________________________
 A.  Standard Tools and Equipment
 (1)  
Rubber or plastic gloves

 (2)  
G02057 Goggles - Safety

 (3)  
Aprons

 (4)  
Boots

 (5)  
Head gear

 B.  Consumable Materials
 (1)  
B00334 - Bicarbonate of Soda

 (2)  
B00095 Chemical - Sodium Bicarbonate (O-S-576)

 (3)  
G00009 Compound - Corrosion Inhibiting, BMS 3-23, Type II. Examination

 C.  Procedure
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A
737-300/400/500MAINTENANCE MANUAL
 S 912-002
 WARNING:_______ ACIDS SCCIDENTLY SPILLED ON SKIN, CLOTHING OR OTHER MATERIAL
 SHOULD BE FLOODED IMMEDIATELY WITH CLEAN WATER.  IF EYES ARE
 INVOLVED FLOOD WITH COPIOUS QUANTITY OF CLEAN WATER AND CONSULT

 A PHYSICIAN IMMEDIATELY.
 (1)  Take these precautions when you work with an acid spill condition:
 (a)  
Adequate protective clothing (rubber or plastic gloves, goggles, face shields, ap rons, boots, head gear, etc.) should be worn when handling or working in acidcontaminated areas.

 (b)  
Wash hands after using acid neutralizing treatment solution and/or materials befo re eating or smoking.

 (c)  
Waste materials, solvents, chemical solutions, wiping rags, masking materials, et c., shall be collected and disposed of safely.

 S 942-003
 (2)  Do these steps to isolate the contaminated area:
 (a)  
Do not allow acid spills to spread from areas of contamination.

 (b)  
Using plastic sheets is advised for protection of equipment beneath battery areas. If equipment is operating venting requi rements should be maintained.

 (c)  
Consider protecting uncontaminated areas by taping down protective material such as plastic sheets.

 S 112-004
 (3)  Do these steps to clean the area of an acid spillage
 (a)  
If equipment is adjacent to the treatment area use plastic sheets to cover the eq uipment to prevent inadvertent splashing of acids or treatment fluids.

 (b)  
Wipe up excess fluids with cloth and discard cloth into plastic container fordisposition.

 (c)  
Neutralize the treatment area with a 20% sodium bicarbonate solution applied with a brush or cloth swab. Particular attention should be given to faying surface joints. Pressure application may be required to flush the joint thoroughtly.

 NOTE: One pound of sodium bicarbonate in 1 gallon of water
____ will give the necessary solution.
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A 737-300/400/500MAINTENANCE MANUAL
 (d)  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 area fully.
 (e)  Apply the solution until bubbles cease in the acid/solution.
 NOTE:____ When the bubbles cease, the acid has become neutral.
 (f) (g) (h) (i)  Then allow the solution to remain on the surface for an additional 5 minutes after the bubbles stop.Remove the solution with mop or sponge.Flush the area with large quantities of clean water. 1) Rub the surface with a soft brush.Do a test of the cleaned area with limus paper.
　
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