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 1.  General_______
 A.  This procedure has one task.
 (1) A conditional inspection for acid spillage.
 B.  This task has an inspection and clean up procedure for areas where acid has touched the airplane.
 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 repair. Spills do occur at times and thorough neutralizing and/or rinsing is necesssary 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 sources are usually large 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 05-51-57-052-001
 2.  Corrosion Removal After Acid Spills___________________________________
 A.  Equipment
 (1)  
Aprons
 (commercially available)

 (2)  
Boots
 (commercially available)

 (3)  
Gloves - Rubber, Elbow Length
 (commercially available)

 (4)  
Goggles - Safety
 (commercially available)

 (5)  
Head Gear
 (commercially available)

 (6)  
Shield - Face
 (commercially available)

 

 B.  Consumable Materials
 (1)
Chemical, Sodium bicarbonate - O-S-576

 (2)
Cleaner, Bicarbonate of soda

 (3)
Compound, Organic Corrosion Inhibiting - BMS3-23

 C.  Procedure
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A
747-400 MAINTENANCE MANUAL
 S 342-005
 WARNING:_______ ACIDS ACCIDENTALLY 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 should be worn when handling or working in acid contaminated areas. 1) gloves 2) goggles 3) shield 4) aprons 5) boots 6) head gear

 (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 942-002
 (2)  Do these steps to isolate the contaminated areaa:
 (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 112-003
 (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 for disposition.

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 ALL  ú ú 01 Page 202 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
 (c)  Neutralize the treatment area with a 20% cleaner, bicarbonate of soda 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.
　
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