ARP159A - Dielectric Testing of Spark Plugs

Details Document Number: ARP159A Revision Number: A Title Dielectric Testing of Spark Plugs Scope This report provides information on instrumentation and procedures for the dielectric testing of aircraft piston engine spark plugs to determine their functional condition. This report describes a method of determining the dielectric integrity of a spark plug by subjecting the insulation in the plug to voltage stress.

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