Squawk Box

June 2013 Issue

Failed, Broken, Leaking

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

The pilot observed smoke in the cockpit, declared an emergency and landed normally. On inspection, the muffler’s aft wall was missing and exhaust was directed onto the battery box, which melted the battery and battery contactor, clock fuse holder, both battery cables and boots. Also, the gascolator push/pull control knob was melted and all wiring into the engine compartment was destroyed. The owner recalls the engine backfiring when a student performed ignition test at high rpm.

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