Squawk Box

May 2011 Issue

Failed And Broken

The following information is derived from the FAA’s Service Difficulty Reports and Aviation Maintenance Alerts.

The ACS/Gerdes ignition switch on this aircraft had never been inspected in accordance with Airworthiness Directive 93-05-06. Upon disassembly, the circuit board plate was found to be severely worn, and one contact point was burned. Discussions with other technicians leads me to the conclusion this AD is overlooked due in part to assuming no AD exists for switches manufactured after 1993.

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