AIRCRAFT MAINTENANCE MANUAL
DFE-AMM-AR1
Rev. 1 – 07/24/2014
9-3
Circuit breakers/switches
The circuit breakers E.T.A are located on the lower edge of instrument panel
9.2.2. Instructions for Authorized Maintenance, Repair or Alterations
9.2.2.1.
Inspection and operation checks of electrical system
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Tools needed: Screwdriver
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Parts needed: None
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Type of maintenance: Line
•
Level of Certification needed: - Aircraft owner (only for ELSA)
- Sport pilot or higher
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Instructions:
1. Remove top cover of the instrument panel and cowlings
2. Inspect equipment, electrical assemblies, and wiring installations for damage, general
condition, and proper functioning to ensure the continued satisfactory operation of the
electrical system.
3. A list of suggested problems to look for and checks to be performed are:
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Damaged, discolored, or overheated equipment, connections, wiring, and installations.
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Excessive heat or discoloration at high current carrying connections.
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Misalignment of electrically driven equipment.
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Poor electrical bonding (broken, disconnected or corroded bonding strap) and
grounding, including evidence of corrosion.
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Dirty equipment and connections
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Improper, broken, inadequately supported wiring and conduit, loose connections of
terminals, and loose ferrules.
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Poor mechanical or cold solder joints.
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Condition of circuit breaker and fuses.
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Insufficient clearance between exposed current carrying parts and ground or poor
insulation of exposed terminals.
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Broken or missing safety wire, broken bundle lacing, cotter pins, etc.
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Operational check of electrically operated equipment such as motors, inverters,
generators, batteries, lights, protective devices, etc.
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Voltage check of electrical system with portable precision voltmeter.
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Condition of leds
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Task proper accomplishment check: None
9.2.2.2.
Cleaning of electrical system
•
Tools needed: Screwdriver
•
Parts needed: None
•
Type of maintenance: Line
•
Level of Certification needed:
-
Repairman (LS-M) or Mechanic (A&P) – both with the minimum level of certification to
perform heavy maintenance of SLSA in the U.S.
-
FAA approved Part 145 Repair station