Is AD 2012-22924 a recurring Airworthiness Directive?

No — AD 2012-22924 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2012-22924 apply to?

AD 2012-22924 applies to Lycoming — models O-360, LO-360, IO-360, LIO-360, AEIO-360, IO-390, AEIO-390, O-540. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2012-22924

one-time

AD 2012-22924 · 2012-09-19 · reciprocating engine

Airworthiness Directives; Lycoming Engines Reciprocating Engines

What this AD requires

We are superseding an existing airworthiness directive (AD) for certain Lycoming Engines (L)O-360, (L)IO-360, AEIO-360, O-540, IO- 540, AEIO-540, (L)TIO-540, IO-580, and IO-720 series reciprocating engines. That AD currently requires replacing certain crankshafts in the affected engines. This AD continues to require replacing certain crankshafts, corrects the start date of affected engine models in Lycoming Mandatory Service Bulletin (MSB) No. 569A to the start date in Supplement No. 1 to Lycoming MSB No. 569A, dated May 27, 2009, and includes additional (formerly experimental) IO-390, AEIO-390, and AEIO- 580 series engine models having affected crankshafts. This AD was prompted by Lycoming Engines discovering that the start date of affected engine models in MSB No. 569A is incorrect and the need to include additional engine models having the affected crankshafts. We are issuing this AD to prevent failure of the crankshaft, which will result in total engine power loss, in-flight engine failure, and possible loss of the aircraft.

Which aircraft AD 2012-22924 applies to

MakesLycoming

ModelsO-360, LO-360, IO-360, LIO-360, AEIO-360, IO-390, AEIO-390, O-540, IO-540, AEIO-540, TIO-540, LTIO-540, IO-580, AEIO-580, IO-720

Applies to engines listed by engine model number and serial number in Tables 1-4, and engines with crankshafts listed by crankshaft serial number in Table 5, of Lycoming Mandatory Service Bulletin (MSB) 569A, dated April 11, 2006 (Supplement No. 1 dated May 27, 2009); applicable engines were manufactured new, rebuilt, overhauled, or had a crankshaft installed after January 1, 1997.

Whether AD 2012-22924 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 2012-22924 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.