Airworthiness Directive · Amendment 39-12505 · Hartzell Propeller Inc. ( )HC-( )2Y( )-( ) Propellers
Hartzell Propeller Inc. ( )HC-( )2Y( )-( ) Propellers
This airworthiness directive (AD) is applicable toHartzell Inc ()HC-()2Y()-() propeller models (also known as Y- shank propellers) installed on Piper PA-32 series aircraft with Textron Lycoming 540 series engines that are rated at 300 HP or higher, or installed on Pilatus Britten Norman or Britten Norman BN- 2 series aircraft (also known as Islander or Trislander) with Textron Lycoming 540 series engines, or installed on any aircraft certificated in the acrobatic category, or installed on any aircraft that has ever been used for agricultural operations. These propellers have model numbers in the form of ()HC-()2Y()-(), which have no suffix letter or have the suffix letter "A" or "E" at the end of the hub serial number. This AD does not apply to Hartzell Propeller Inc ()HC-()2Y()-() propeller models with the suffix letter "B" at the end of the hub serial number. The following list of aircraft, type certificated in the acrobatic category or used for agricultural operations, may have Hartzell Y-shank propellers installed, but this list is for reference purposes only: Aermacchi S.p.A. (formerly SIAI-Marchetti) S.205 series aircraft, S.208 series aircraft, F.260 series aircraft; American Champion (formerly Bellanca, Champion) 8KCAB, 8GCBC; Aviat (licensed by Sky International (formerly White International and Pitts)) S-1T, S-2, S-2A, S-2S, S-2B ; Cessna A188A, A188B, T188C; Flugzeugwerke Altenrheim AG (FFA) AS202/18A "BRAVO", AS202/18A4" BRAVO;" Great Lakes Aircraft Co. or Chaparral Motors 2T-1 series aircraft; Moravan National Corporation Zlin 526 ; Piper PA-25-260, PA-36-300; SOCATA--Groupe Aerospatiale (Morane Saulnier) MS893A, and MS893E.
This amendment supersedes priority letter AD 90-02-23, that is applicable to certain Hartzell Propeller Inc. ( )HC-( )2Y( )-( ) propellers. That priority letter currently requires repetitive visual inspections of propeller hubs for cracks using a 10X glass and, if necessary, removal of cracked hubs and replacement with serviceable parts. This amendment changes the frequency and method of inspection by requiring initial and repetitive eddy current inspections (ECI) of the propeller hub fillet radius for cracks and requires that certain model propeller hubs be removed from service. In addition, this AD allows installation of an improved design propeller hub as terminating action to the repetitive ECI. This amendment is prompted by reports of cracked propeller hubs found in service after they had been inspected in accordance with the visual inspections required by the current AD. The actions specified in this AD are intended to prevent failure of the propeller hub resulting from cracks, that can cause blade separation and subsequent loss of aircraft control.
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
