AD NUMBER: 2006-12-19
MANUFACTURER: Hamilton Standard
SUBJECT: Airworthiness Directive 2006-12-19 SUMMARY: The
FAA is adopting a new airworthiness directive (AD) for Hamilton
Sundstrand model 14RF-19 propellers. This AD requires replacing
certain actuator yokes with improved actuator yokes.
This AD results from certain propeller system actuator yoke arms
breaking during flight.
We are issuing this AD to prevent actuator yoke arms breaking
during flight, which could cause high propeller vibration and
contribute to reduced controllability of the airplane.