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 ___________2. Maintenance
R R R R R  _______CAUTION : ALWAYS OBEY THE PRECAUTIONS THAT FOLLOW TO KEEP ELECTRICAL WIRING IN A SATISFACTORY CONDITION (ELECTRICALLY AND MECHANICALLY SERVICEABLE). WHEN YOU DO MAINTENANCE WORK, REPAIRS OR MODIFICATIONS, ALWAYS KEEP ELECTRICAL WIRING, COMPONENTS AND THE WORK AREA AS CLEAN AS POSSIBLE. TO DO THIS: - PUT PROTECTION, SUCH AS PLASTIC SHEETING, CLOTHS, ETC. AS NECESSARY ON WIRING AND COMPONENTS - REGULARLY REMOVE ALL SHAVINGS, UNWANTED MATERIAL AND OTHER CONTAMINATION. THESE PRECAUTIONS WILL DECREASE THE RISK OF CONTAMINATION AND DAMAGE TO THE ELECTRICAL WIRING INSTALLATION. IF THERE IS CONTAMINATION, REFER TO ESPM CHAPTER 20-55-00, CLEANING.
 A. Electrical Safety Practices.
 _______WARNING : MAKE SURE THAT NO AC OR DC POWER SOURCE IS CONNECTED TO THE AIRCRAFT ELECTRICAL CIRCUITS. THERE IS A RISK OF ELECTROCUTION IF THE AC OR DC POWER STAYS CONNECTED.
 Before you start work: open, safety and tag the circuit breaker(s) related to the system/equipment to prevent the supply of electrical power to the system/equipment during the maintenance work. (Ref. Fig. 001) This prevents the risk of:

20-10-00 Page 1

 Safety Practices - Typical Tag
 Figure 001

 

20-10-00 Page 2

 -Electric shocks that can occur if you touch energized wiring connections, terminals, etc...
 -Short circuits that can occur if metal tools or parts accidentally touch energized wiring, terminals, contacts, etc...
 ____
NOTE : Some circuits breakers (A320 family only) have a red threaded bush (P/N A92529086000). This bush prevents reset of the circuit breaker in flight (the crew cannot pull it). If, for maintenance safety reasons, it is necessary to open such a circuit breaker, you can remove the red threaded bush with a standard wrench.

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 Apr 01/03
R

 B. Materials

 _______
WARNING : BEFORE YOU USE A MATERIAL REFERRED TO IN THIS PUBLICATION, YOU MUST KNOW ALL OF THE APPLICABLE PRECAUTIONS. THESE PRECAUTIONS TELL YOU HOW TO:
 -USE THE MATERIAL SAFELY,

 -KEEP THE MATERIAL SAFELY,
 READ THE SAFETY DATA SHEETS FROM THE MANUFACTURER OR THE
 SUPPLIER OF THE MATERIAL TO LEARN THE RECOMMENDED PRECAUTIONS.
 OBEY YOUR LOCAL REGULATIONS.

 _______
WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL MATERIALS ONLY WITH A GOOD FLOW OF AIR THROUGH THE WORK AREA. THESE MATERIALS ARE POISONOUS AND FLAMMABLE AND SKIN IRRITANTS. OBEY THE MANUFACTURERS INSTRUCTIONS. PUT ON PROTECTIVE CLOTHING. DO NOT GET THEM IN YOUR MOUTH. DO NOT SMOKE. DO NOT BREATHE THE GAS. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.
 C. Tools
 _______
WARNING : BE CAREFUL WHEN YOU USE ELECTRIC TOOLS ON THE AIRCRAFT BECAUSE THERE ARE RISKS OF ELECTROCUTION OR EXPLOSION. IF THERE ARE LOCAL REGULATIONS RELATED TO ELECTRIC TOOLS, MAKE SURE THAT YOU OBEY THEM.
 _______
WARNING : BE CAREFUL WHEN YOU USE ELECTRIC TOOLS IN AREAS WHERE THERE ARE RISKS OF EXPLOSION (FUEL TANKS, FUEL VAPOUR AREAS, ETC.). REFER TO YOUR LOCAL REGULATIONS AND MAKE SURE THAT YOU OBEY THEM. SOME ELECTRIC TOOLS SUCH AS HEAT GUNS, SOLDERING IRONS AND TOOLS WITHOUT INTRINSIC PROTECTION ARE NOT PERMITTED IN THESE AREAS.
 Never use electric tools which deliver an energy of more than 0.02
 millijoule in fuel tanks or in areas where there are flammable vapors.
 Never use heat-generating tools in the fuel tanks or in areas where there
 are flammable vapors.
 Use only crimp-type contacts, terminals, splices, sleeves (non-heat
 shrinkable sleeves) in these areas.

 D. Cables
R For cables in harnesses that are identified by a P/N (engine, landing gear, fuel tanks, etc...), also refer to the applicable manufacturer documentation (CMM).

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 ____________________________________________________
STANDARD TOOLS - GENERAL - DESCRIPTION AND OPERATION
 _______
1. General
 This chapter deals with description, operation and application field of the tools required for removal or installation of items of equipment installed on aircraft:
 _________________________2. Structure of the Chapters
 A. Stripping Tools (Ref. 20-25-10)
 B. Crimping Tools (Ref. 20-25-20)
 C. Shrinking Tools (Ref. 20-25-30)
 D. Insertion/Extraction Tool (Ref. 20-25-40)
 E. Miscellaneous Tools (Ref. 20-25-50)
 F. Electrical cable marking tools (Ref. 20-25-60)
 __________________3. Checking Procedure
 ____
NOTE : Correct combination of cable, tool, terminal end or connector is the first stage in a connection process.
 Before use, every tool must be checked for :
 -identification (tool Serial No.).
　
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