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9/8/98 AC 43.13-1B CHAPTER 11. AIRCRAFT ELECTRICAL SYSTEMS SECTION 1. INSPECTION AND CARE OF ELECTRICAL SYSTEMS 11-1. GENERAL. The term “electrical system” as used in this AC means those parts of the aircraft that generate, distribute, and use electrical energy, including their support and attachments. The satisfactory performance of an aircraft is dependent upon the continued re- liability of the electrical system. Damaged wiring or equipment in an aircraft, regardless of how minor it may appear to be, cannot be tolerated. Reliability of the system is propor- tional to the amount of maintenance received and the knowledge of those who perform such maintenance. It is, therefore, important that maintenance be accomplished using the best techniques and practices to minimize the pos- sibility of failure. This chapter is not intended to supersede or replace any government speci- fication or specific manufacturer’s instruction regarding electrical system inspection and re- pair. 11-2. INSPECTION AND OPERATION CHECKS. Inspect equipment, electrical as- semblies, and wiring installations for damage, general condition, and proper functioning to ensure the continued satisfactory operation of the electrical system. Adjust, repair, overhaul, and test electrical equipment and systems in accordance with the recommendations and procedures in the aircraft and/or component manufacturer’s maintenance instructions. Re- place components of the electrical system that are damaged or defective with identical parts, with aircraft manufacturer’s approved equip- ment, or its equivalent to the original in oper- ating characteristics, mechanical strength, and environmental specifications. A list of sug- gested problems to look for and checks (Refer to the glossary for a description of the check types) to be performed are: a. Damaged, discolored, or overheated equipment, connections, wiring, and installa- tions. b. Excessive heat or discoloration at high current carrying connections. c. Misalignment of electrically driven equipment. d. Poor electrical bonding (broken, dis- connected or corroded bonding strap) and grounding, including evidence of corrosion. e. Dirty equipment and connections. f. Improper, broken, inadequately sup- ported wiring and conduit, loose connections of terminals, and loose ferrules. g. Poor mechanical or cold solder joints. h. Condition of circuit breaker and fuses. i. Insufficient clearance between exposed current carrying parts and ground or poor in- sulation of exposed terminals. j. Broken or missing safety wire, broken bundle lacing, cotter pins, etc. k. Operational check of electrically oper- ated equipment such as motors, inverters, gen- erators, batteries, lights, protective devices, etc. l. Ensure that ventilation and cooling air passages are clear and unobstructed. Par 11-1 Page 11-1PDF Image | AFS-640
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