Airworthiness Directive · Amendment 39-14701 · Hamilton Sundstrand Model 14RF-19 Propellers
Hamilton Sundstrand Model 14RF-19 Propellers
This AD applies to Hamilton Sundstrand Model 14RF-19 propellers with propeller system actuator yoke arms, part number (P/N) 810436-2, which might be installed in actuator assemblies P/N 790199-6. These propellers are installed on, but not limited to, SAAB 340 airplanes.
The FAA is superseding an existing airworthiness directive (AD) for Hamilton Sundstrand model 14RF-19 propellers. That AD currently requires replacing certain actuator yokes with improved actuator yokes. This AD requires the same actions. This AD results from the discovery of a part number (P/N) error in the applicability paragraph of AD 2006-12-19. 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.
You are responsible for having the actions required by this AD performed within 60 days after the effective date of this AD, unless the actions have already been done.
Using the Accomplishment Instructions of Hamilton Sundstrand Service Bulletin 14RF-19-61-113, Revision 1, dated September 2, 2003, replace all actuator yoke arms, P/N 810436-2, with improved actuator yoke arms, P/N 810436-3.
(g) Mark newly installed actuators using the Accomplishment Instructions of Hamilton Sundstrand Service Bulletin 14RF-19-61-113, Revision 1, dated September 2, 2003.
(h) After the effective date of this AD, do not install any actuator yoke arms, P/N 810436-2, into any propeller assembly.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Propellers
