Airworthiness Directive · Amendment 39-18422 · Dowty Propellers Constant Speed Propellers
Dowty Propellers Constant Speed Propellers
This AD applies to Dowty Propellers R352/6-123-F/1, R352/6-123-F/2, and R410/6-123-F/35 model propellers, part numbers (P/Ns) 660715001, 660715004, and 660715005 with hub P/Ns 660715201, 660715255, 660720217, 660720241, 660720252, 660720260, and 660720288, installed.
We are adopting a new airworthiness directive (AD) for certain Dowty Propellers R352/6-123-F/1, R352/6-123-F/2, and R410/6-123-F/35 model propellers. This AD was prompted by reports of dowel hole cracks in the face of the rear hub half. This AD requires installing dowel hole liners as necessary. We are issuing this AD to prevent loss of structural integrity of the propeller hub, which could result in damage to the propeller and damage to the airplane.
(1) At the next removal of the propeller from the airplane, after the effective date of this AD, install liners into the hub location dowel holes and identify the hub P/N.
(2) Use Dowty Propellers Alert Service Bulletin (ASB) No. F50-61-A165, Revision 2, dated July 28, 2015 to install the liners and identify the hub.
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
