Feather Failures
The following information is derived from the FAAs 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…