05-51-19
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ú ú ú 05.101 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. Page 212Sep 28/02
A
757 MAINTENANCE MANUAL
BATTERY ELECTROLYTE CONTAMINATION CONDITION - MAINTENANCE PRACTICES
___________________________________________________________________ (CONDITIONAL INSPECTION)
________________________
1. General_______
A. This procedure has these two tasks:
(1)
Lead Acid Battery Contamination
(2)
Alkaline Battery Contamination.
B. The primary source of acid contamination is in the battery compartments.
C. Battery electrolytes can overflow during battery charging, or leak when the battery is serviced.
D. Contamination occurs at times and the acid must be made neutral before corrosion damage can occur.
E. Electrolyte contamination, unless you make it neutral, can quickly corrode a metalic structure.
F. Electrolyte can cause damage to materials such as fabrics, wood, leather, and other non-metalic materials.
(1) Electrolyte contamination can cause discoloration on the surface it touches.
TASK 05-51-20-112-001
2. Lead Acid 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)
B00334 - Bicarbonate of Soda
(2)
B00095 Chemical - Sodium Bicarbonate (O-S-576)
C. Procedure
S 942-002
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. KEEP THE FUMES FROM SPARKS, FLAMES, AND TEMPERATURES ABOVE THE FLASHPOINT. BATTERY ELECTROLYTE IS A POISONOUS AND FLAMMABLE MATERIAL WHICH CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
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05-51-20
ALL ú ú 01 Page 201 ú Sep 20/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
(1) You must do the safety steps that follow when lead acid contamination or leakage is found.
(a)
Do not let the acid 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 acids or the solution to make the acid neutral.
(e)
You must always wear protective clothing when you clean up acid contamination.
S 112-003
(2) Do the steps that follow to clean-up the battery electrolyte contamination:
(a)
Soak up the excess fluids with a cloth.
(b)
Neutralize the contaminated area with a 20 percent sodium bicarbonate solution.
NOTE: One pound of sodium bicarbonate mixed into one gallon of
____ water will make the necessary solution.
(c) Apply the solution with a cloth, mop, brush, or sponge.
NOTE: Do not put the sodium bicarbonate solution into the
____
battery.
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.
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