Squawk Box

August 2011 Issue

Burned And Separated

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

The pilot reported a burning smell in the cabin. Inspection revealed the taxi light circuit breaker switch had burned internal components. This switch (p/n 35-380132-105) is the improved model required by AD 2008-13-07. Unfortunately, when these switches overheat, it can be impossible to determine if the insulators had been installed improperly, or installed at all. This was the second post-AD switch failure in this fleet.

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