Airworthiness Directive · Amendment 39-11533 · Raytheon Aircraft Company Beech Models 65-90, 65-A90, B90, and C90 Airplanes
Raytheon Aircraft Company Beech Models 65-90, 65-A90, B90, and C90 Airplanes
Any Model 65-90, 65-A90, B90, and C90 airplane (all serial numbers) that:
(1) Has at least one Motorlet, Walter M601E-11 turboprop engine (with an Avia-Hamilton Standard VJ8-510 propeller) installed, in accordance with Supplemental Type Certificate (STC) SA01366AT; and
(2) Is certificated in any category.
This amendment adopts a new airworthiness directive (AD) that applies to Raytheon Aircraft Company (Raytheon) Beech Models 65-90, 65- A90, B90, and C90 airplanes that incorporate a certain engine and propeller configuration. This AD prohibits you from operating any affected airplane with this engine and propeller configuration and prohibits its future installation. Results of an accident investigation involving one of the affected airplanes reveals installation discrepancies with the engine and propeller configuration. These discrepancies, if not corrected, could lead to engine failure and the inability to feather the propeller. The actions specified by this AD are intended to prevent an uncontained engine failure due to suspect engine and propeller installation, which could result in loss of control of the airplane.
To address this problem, you must accomplish the following actions:
(1) Do not operate any airplane that has a Motorlet, Walter M601E-11 turboprop engine (with an Avia-Hamilton Standard VJ8-510 propeller) installed, in accordance with STC SA01366AT.
(2) Do not install, on any affected airplane, any Motorlet, Walter M601E-11 turboprop engine (with an Avia-Hamilton Standard VJ8-510 propeller), in accordance with STC SA01366AT.
As of the effective date of this AD.
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.
