Is AD 2010-20-23 a recurring Airworthiness Directive?

Yes — AD 2010-20-23 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Airworthiness Directive 2010-20-23

Q: Which aircraft does AD 2010-20-23 apply to?

AD 2010-20-23 applies to Bombardier-Rotax — models 912 F series, 912 S series, 914 F series, 912, 914. Serial/part conditions may narrow it to specific aircraft.

recurring

Official AD 2010-20-23 · FR doc 2010-24629 · 2010-10-04 · reciprocating engine

Airworthiness Directives; Bombardier-Rotax GmbH Type 912 F, 912 S, and 914 F Series Reciprocating Engines

What this AD requires

The FAA is superseding an existing airworthiness directive (AD) for certain serial numbers (S/Ns) of Bombardier-Rotax GmbH type 912 F and 914 F series reciprocating engines. That AD currently requires initial and repetitive visual inspections of the engine crankcase for cracks. This AD requires those same inspections, adds the 912 S series to the affected population, adds a test procedure to determine the engine suitability for a special flight permit, and changes applicability from engine S/N to crankcase S/N. This AD results from an increase in the affected crankcase population. We are issuing this AD to prevent oil loss caused by cracks in the engine crankcase, which could lead to in-flight failure of the engine and forced landing.

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 2010-20-23 applies to

MakesBombardier-Rotax

Models912 F series, 912 S series, 914 F series, 912, 914

Serial-conditional — narrows to serials ?–27811.

Applies only to engines with a crankcase serial-numbered 27811 or lower, installed. Installed on, but not limited to, Aeromot-Industria Mecanico Metalurgica Itda AMT-300; Aquila Technische Entwiklugen GmbH AQUILA AT01; Diamond Aircraft Industries DA-20A1; Diamond Aircraft Industries GmbH HK36TC, HK36TTC, HK36TTC-ECO, and HK36TTS; Iniziative Industriali Italiane S.p.A. Sky Arrow 650 series; SCHEIBE-Flugzeugnau GmbH SF 25C; and Stemme S10-VT aircraft

Whether AD 2010-20-23 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 2010-20-23 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.