Is AD 2006-22-12 a recurring Airworthiness Directive?

Yes — AD 2006-22-12 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2006-22-12 apply to?

AD 2006-22-12 applies to Hartzell Propeller Inc. — models HC-B5MP-3( )/M10282A( )+6, HC-B5MP-3( )/M10876( )( )( )( ), HC-B5MP. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2006-22-12

recurring

Official AD 2006-22-12 · FR doc E6-17925 · 2006-10-27 · propeller

Airworthiness Directives; Hartzell Propeller Inc. Model HC-B5MP-3( )/M10282A( )+6 and HC-B5MP-3( )/M10876( )( )( )( ) Five-Bladed Propellers.

What this AD requires

The FAA is superseding an existing airworthiness directive (AD) for Hartzell Propeller Inc. model HC-B5MP-3( )/M10282A( )+6 five- bladed propellers. That AD currently requires initial and repetitive torque check inspections on the mounting bolts on certain model Hartzell Propeller Inc. HC-B5MP-3( )/M10282A( )+6 five-bladed propellers, replacement of mounting bolts if necessary, and inspection and resurfacing of the engine and propeller mounting flanges if necessary. This AD requires the same actions but requires more detailed overhaul inspections and maintenance than the previous AD, AD 2004-21- 01. This AD also adds Hartzell Propeller Inc. HC-B5MP-3( )/M10876( )( )( )( ) five-bladed propellers to the applicability. This AD results from reports of fretting wear still occurring between the engine and propeller mounting flanges. The fretting wear results in loss of mounting bolt preload, causing failure of the mounting bolts. We are issuing this AD to prevent propeller separation from the airplane.

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

Which aircraft AD 2006-22-12 applies to

MakesHartzell Propeller Inc.

ModelsHC-B5MP-3( )/M10282A( )+6, HC-B5MP-3( )/M10876( )( )( )( ), HC-B5MP

Five-bladed propellers. Parentheses in the propeller model number indicate presence or absence of additional letter(s) varying the basic propeller model; AD applies regardless. Installed on Nord 262(A) (Frakes/Mohawk), Short Brothers SD3-30 (Sherpa), SD3-60, SD3-60-200 (Sherpa), and PZL Mielec PZL-M18 (Dromader) airplanes.

Whether AD 2006-22-12 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 2006-22-12 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.