Airworthiness Directive · Amendment 39-9697 · Hartzell Propeller, Inc. Propellers
Hartzell Propeller, Inc. Propellers
This AD applies to Hartzell Propeller, Inc. HC-B3T, HC-B5MP-3, HC-B5MP-5, HC-D4N, HC-E4A.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment adopts a new airworthiness directive (AD) that is applicable to certain propeller blades, identified by serial number, installed on Hartzell Propeller Inc. HC-B3TN, HC- B5MP, HC-E4A, and HC-D4N series propellers. This action requires, within specified hours time in service after the effective date of this AD, a one-time fluorescent dye penetrant inspection of a twelve-inch long area on both the face and camber sides of propeller blade shanks for forging flaws or cracks, and replacement of defective propeller blades with serviceable parts. In addition, this action requires this inspection prior to further flight for propellers that experience sudden or unusual vibration. This amendment is prompted by a report of an inflight propeller blade separation. The actions specified in this AD are intended to prevent propeller blade separation caused by propeller blade shank cracks emanating from forging flaws, which could result in loss of control of the aircraft.
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
