757 AMM 飞机维护手册 时间限制/维护检查(61)

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 B.  This task has an inspection and clean up procedures for areas where acid hastouched the airplane. Acid spills, unless netralized, can rapidly corrode metallic structure.
 C.  The primary source of acid spillage is in the battery compartments where acid electrolytes may overflow during charging or spill during battery servicing.
 D.  Acid-based corrosion removal compounds and airplane cleaners are used quite extensively during routine maintenance and repair. Spills do occur at atimes and thorough neutralizing and/or rinsing is necessary to preclude corrosion damage.
 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 usually larger in scale than spills previously mentioned. It is, therefore, advisable that the acid spillage be neutralized as soon as possible. such sources are
 F.  Operators should also be cognizant of the fact that acids may deteriorate nonmetallic materials such as fabrics, wood, leather, etc.
 TASK 05-51-57-002-001
 2.  Corrosion Removal After Acid Spills___________________________________
 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)  
B00334 - Bicarbonate of Soda

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

 (3)  
G00009 Compound - Corrosion Inhibiting, BMS 3-23, Type II 1. Examination

 C.  Procedure
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757
MAINTENANCE MANUAL

 S 912-002
 WARNING:_______ ACIDS ACCIDENTLY 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, aprons, boots, head gear, etc.) should be worn when handling or working in acid contaminated areas.

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

 (c)  
Waste materials, solvents, chemical solutions, wiping rags, masking materials,etc., 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 requirements 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 equipment 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 thoroughly.

 NOTE: One pound of sodium bicarbonate in 1 gallon of water
____ will give the necessary solution.
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757 MAINTENANCE MANUAL
　
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