Is AD 2001-23-08 a recurring Airworthiness Directive?

Yes — AD 2001-23-08 requires a repetitive inspection every 50 hours. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2001-23-08 apply to?

AD 2001-23-08 applies to Hartzell — models ()HC-()2Y()-(), HC-2Y. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2001-23-08

recurring

Official AD 2001-23-08 · FR doc 01-28689 · 2001-11-19 · propeller

Airworthiness Directives; Hartzell Propeller Inc. ( )HC-( )2Y( )-( ) Propellers

What this AD requires

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.

Repetitive inspection. Re-inspect every 50 hours. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2001-23-08 applies to

MakesHartzell

Models()HC-()2Y()-(), HC-2Y

Applies to Hartzell ()HC-()2Y()-() propeller models (Y-shank propellers) with no suffix letter or suffix 'A' or 'E' at the end of the hub serial number; does NOT apply to suffix 'B' hub serial numbers. Applies when installed on Piper PA-32 series aircraft with Textron Lycoming 540 series engines rated at 300 HP or higher, or Pilatus Britten-Norman/BN-2 series aircraft (Islander/Trislander) with Textron Lycoming 540 series engines, or any aircraft certificated in the acrobatic category, or any aircraft ever used for agricultural operations. Reference list of acrobatic/agricultural aircraft types that may have Hartzell Y-shank propellers (for reference only, not exhaustive): Aermacchi/SIAI-Marchetti S.205/S.208/F.260; American Champion (Bellanca/Champion) 8KCAB/8GCBC; Aviat (Sky Int'l/White Int'l/Pitts) S-1T/S-2/S-2A/S-2S/S-2B; Cessna A188A/A188B/T188C; FFA AS202/18A; Great Lakes/Chaparral Motors 2T-1; Moravan Zlin 526; Piper PA-25-260/PA-36-300; SOCATA (Morane Saulnier) MS893A/MS893E.

Whether AD 2001-23-08 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

How AD compliance is recorded

A valid compliance record (14 CFR 43.9) states:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.

Date — When the work was done.

Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.

Signature & certificate — The A&P/IA who returned it to service, with certificate number.

Is AD 2001-23-08 complied with on your aircraft?

Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.

Look up a tail number →Read the full directive (Federal Register)

Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.