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20-10-24
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A
757 MAINTENANCE MANUAL
FLOOR PANEL PROTECTION - MAINTENANCE PRACTICES
______________________________________________
TASK 20-10-25-612-001
1. Protection of Floor Panel_________________________
A. General
(1) To prevent possible floor panel damage during maintenance, do these steps:
(a)
Let only one person at a time use the ladder, stand, or scaffolding.
(b)
Use plywood bearing pads that are a minimum of 1/2-inch thick and one-foot square under each leg, if you have these conditions:
(c)
You use ladders, stands, or scaffolding with leg-bearing surfaces. Leg-bearing surfaces include rollers, screws, and sharp edges. 1) You have a leg-bearing surface of less than eight square
inches for each leg.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-10-25
ALL ú ú 01 Page 201 ú Dec 20/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
HEAT GUNS, SOLDERING GUNS AND SOLDERING IRONS -
_______________________________________________ MAINTENANCE PRACTICES
_____________________
TASK 20-10-26-302-001
1. Use of Heat Guns, Soldering Guns, and Soldering Irons_____________________________________________________
A. General
(1)
This procedure gives the minimum recommended safety procedures for heat guns, soldering guns, and soldering irons used near airplanes. These are general procedures. If regulations made by local agencies or procedures made by the airline are more applicable, use them. Boeing cannot know or write about all possible conditions which the airlines can have.
(2)
You must examine the conditions and be careful. Customer airlines must know how heat guns, soldering guns, and soldering irons are used.
(3)
Heat guns, soldering guns, and soldering irons can cause an explosion. Components in all of these devices can operate at temperatures higher than the fuel ignition temperature (450°F). Heat guns and soldering guns also can contain electrical switches which can cause sparks. These sparks can cause the fuel to burn.
(4)
We do not recommend you use a device to supply heat in the fuel tanks. You can have a good flow of air in the fuel tanks. You can make them safe when you fill the fuel tanks with nitrogen. For the repair of the wires in the fuel tanks, we recommend you use procedures that use crimped splices and sleeves with nylon ties. These procedures are specified in WDM Chapter 20.
(5)
Do not use heat guns, soldering guns, or soldering irons less than 100 feet from an airplane during these operations:
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