Squawk Box

December 2001 Issue

Feather Failures

Obstacles to feathering a prop in a twin need higher visibility, FAA says

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


Pilots of piston-powered twins know of the need to feather the prop on a dead engine, but occasionally the task does not get accomplished – sometimes through human error, sometimes through mechanical blockages.

In a recent accident, the pilot encountered a blocked propeller that could not be feathered.

The FAA began investigating the potential for additional accidents of a similar nature involving a propeller that could not be feathered either with or without engine rotation. In most pilot operating handbooks and Aircraft Flight Manuals, there are warnings of the...

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