Is AD 2009-26-12 a recurring Airworthiness Directive?

Yes — AD 2009-26-12 requires a repetitive inspection. Next-due depends on the aircraft's time in service.

Airworthiness Directive 2009-26-12

Q: Which aircraft does AD 2009-26-12 apply to?

AD 2009-26-12 applies to Lycoming Engines — models O-320-A1A, O-320-A1B, O-320-A2A, O-320-A2B, O-320-A2C, O-320-A2D, O-320-A3A, O-320-A3B. Serial/part conditions may narrow it to specific aircraft.

recurring

Official AD 2009-26-12 · FR doc E9-30732 · 2009-12-31 · reciprocating engine

Airworthiness Directives; Engine Components, Inc. (ECi) Reciprocating Engine Cylinder Assemblies

What this AD requires

The FAA is superseding an existing airworthiness directive (AD) for Lycoming Engines (formerly Textron Lycoming) models 320, 360, and 540 series, "Parallel Valve" reciprocating engines, with certain Engine Components, Inc. (ECi) cylinder assemblies, part number (P/N) AEL65102 series "Titan," installed. That AD currently requires initial and repetitive visual inspections and compression tests to detect cracks at the head-to-barrel interface, replacement of cylinder assemblies found cracked, and replacement of certain cylinder assemblies at new, reduced times-in-service. This AD requires the same actions, but for an expanded population of cylinder assemblies. This AD results from reports of 10 additional cylinder head separations since issuing AD 2008-19-05, on cylinder serial numbers not listed in that AD. We are issuing this AD to prevent loss of engine power due to cracks at the head-to-barrel interface and possible engine failure caused by separation of a cylinder head, which could result in loss of control of the aircraft.

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 2009-26-12 applies to

MakesLycoming Engines

ModelsO-320-A1A, O-320-A1B, O-320-A2A, O-320-A2B, O-320-A2C, O-320-A2D, O-320-A3A, O-320-A3B, O-320-A3C, O-320-B1A, O-320-B1B, O-320-B2A, O-320-B2B, O-320-B2C, O-320-B2D, O-320-B2E, O-320-B3A, O-320-B3B, O-320-B3C, O-320-C1A, O-320-C1B, O-320-C2A, O-320-C2B, O-320-C2C, O-320-C3A, O-320-C3B, O-320-C3C, O-320-D1A, O-320-D1AD, O-320-D1B, O-320-D1C, O-320-D1D, O-320-D1F, O-320-D2A, O-320-D2B, O-320-D2C, O-320-D2F, O-320-D2G, O-320-D2H, O-320-D2J, O-320-D3G, O-320-E1A, O-320-E1B, O-320-E1C, O-320-E1F, O-320-E1J, O-320-E2A, O-320-E2B, O-320-E2C, O-320-E2D, O-320-E2E, O-320-E2F, O-320-E2G, O-320-E2H, O-320-E3D, O-320-E3H, O-320 (no suffix), IO-320-A1A, IO-320-A2A, IO-320-B1A, IO-320-B1B, IO-320-B1C, IO-320-B1D, IO-320-B1E, IO-320-B2A, IO-320-C1A, IO-320-C1B, IO-320-C1F, IO-320-D1A, IO-320-D1AD, IO-320-D1B, IO-320-D1C, IO-320-E1A, IO-320-E1B, IO-320-E2A, IO-320-E2B, IO-320-F1A, AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A, AEIO-320-E1B, AEIO-320-E2A, AEIO-320-E2B, AIO-320-A1A, AIO-320-A1B, AIO-320-A2A, AIO-320-A2B, AIO-320-B1B, AIO-320-C1B, LIO-320-B1A, LIO-320-C1A, O-360-A1A, O-360-A1C, O-360-A1D, O-360-A2A, O-360-A2E, O-360-A3A, O-360-A3D, O-360-A4A, O-360-B1A, O-360-B1B, O-360-B2A, O-360-B2B, O-360-C1A, O-360-C1C, O-360-C1G, O-360-C2A, O-360-C2B, O-320, IO-320, AEIO-320, AIO-320, LIO-320, O-360

Serial-conditional — narrows to serials 1138-02–35171-22, 35239-01–42179-30.

Part-conditional — AEL65102-NST04, AEL65102-NST05, AEL65102-NST06, AEL65102-NST07, AEL65102-NST08, AEL65102-NST10, AEL85099.

Applies to Lycoming 320/360/540-series 'Parallel Valve' reciprocating engines listed in AD Table 1 that are fitted with an ECi 'Titan' cylinder assembly, P/N AEL65102 series, and cylinder head P/N AEL85099. Affected cylinder assembly serial numbers fall in Group A (1138-02 through 35171-22) or Group B (35239-01 through 42179-30). Source excerpt of AD Table 1 was truncated after the O-360-A1A...C2B entries (AEL65102-NST10); the AD's stated applicability also references 360- and 540-series models beyond what is captured here.

Whether AD 2009-26-12 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 2009-26-12 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.