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Airworthiness Directive 2005-26-10

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Official AD 2005-26-10 · FR doc 05-24449 · 2005-12-27 · reciprocating engine

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

What this AD requires

The FAA is adopting a new 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 "Classic Cast", installed. This AD requires replacing these ECi cylinder assemblies. This AD results from reports of about 30 failures of the subject cylinder assemblies marketed by ECi. We are issuing this AD to prevent loss of engine power due to cracks in the cylinder assemblies and possible engine failure caused by separation of a cylinder head.

Which aircraft AD 2005-26-10 applies to

MakesLycoming EnginesTextron Lycoming
ModelsO-320-A1B, O-320-A2B, O-320-A2C, O-320-A2D, O-320-A3A, O-320-A3B, O-320-B2B, O-320-B2C, O-320-B3B, O-320-B3C, O-320-C2B, O-320-C2C, 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-F1F, 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, 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-C1B, IO-320-D1A, IO-320-D1AD, IO-320-D1B, IO-320-D1C, IO-320-E1A, IO-320-E1B, IO-320-E2A, IO-320-E2B, AEIO-320-D1B, AEIO-320-D2A, AEIO-320-D2B, AEIO-320-E1A, AEIO-320-E1B, AEIO-320-E2B, AIO-320-A1A, AIO-320-A1B, AIO-320-A2A, AIO-320-A2B, AIO-320-B1B, AIO-320-C1B, LIO-320-B1A, O-320-C1A, O-320-C1F, O-320-F1A, LIO-320-C1A, O-320-A1A, O-320-A2A, O-320-A3C, O-320-B1A, O-320-B1B, O-320-C1B, O-320-C2A, O-320-C3A, 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-C1A, O-360-C1C, O-360-C1G, O-360-C2A, O-360-C2B, O-360-C2C, O-360-C2D, O-360-B1A, O-360-B1B, O-360-B2A, O-360-B2B, O-360-D1A, O-360-D2A, O-360-D2B, IO-360-B1A, IO-360-B1B, IO-360-B1C, HO-360-A1A, HO-360-B1A, HO-360-B1B, HIO-360-B1A, HIO-360-B1B, AEIO-360-B1B, AEIO-540-A1A, AEIO-540-A1A5, AEIO-540-A1B5, AEIO-540-A1C5, AEIO-540-A1D, AEIO-540-A1D5, AEIO-540-A2B, AEIO-540-A3D5, AEIO-540-A4A5, AEIO-540-A4B5, AEIO-540-A4C5, AEIO-540-A4D5, AEIO-540-B1A5, AEIO-540-B1B5, AEIO-540-B1C5, AEIO-540-B2C5D, AEIO-540-B4A5, AEIO-540-B4A5D, AEIO-540-D1A5, AEIO-540-E1A, AEIO-540-E4A5, AEIO-540-E4B5, AEIO-540-E4C5, AEIO-540-F1A5, AEIO-540-F1B5, AEIO-540-G1A5, AEIO-540-G2A5, IO-540-C1B5, IO-540-C1C5, IO-540-C2C, IO-540-C4B5, IO-540-C4B5D, IO-540-C4C5, IO-540-D4A5, IO-540-D4B5, IO-540-N1A5, IO-540-N1A5D, O-360-A1AD, O-360-A1F, O-360-A1F6, O-360-A1F6D, O-360-A1G, O-360-A1G6, O-360-A1G6D, O-360-A1H, O-360-A1H6, O-360-A1J, O-360-A1LD, O-360-A2D, O-360-A2F, O-360-A2G, O-360-A2H, O-360-A3AD, O-360-A4AD, O-360-A4D, O-360-A4G, O-360-A4J, O-360-A4JD, O-360-A4K, O-360-A4M, O-360-A4N, O-360-A5AD, O-360-C1E, O-360-C1F, O-360-C2E, O-360-F1A6, O-360-G1A6, TIO-360-A1A6D, LTO-360-A1A6D, IO-360-A1G6D, IO-360-A1H6, IO-360-B1BD, IO-360-B1D, IO-360-B1E, IO-360-B1F, IO-360-B1F6, IO-360-B2E, IO-360-B2F, IO-360-B2F6, IO-360-B4A, IO-360-E1A, IO-360-E4A, IO-360-F1A, IHO-360-B1A, IHO-360-B1B, AEIO-360-B1D, AEIO-360-B1F, AEIO-360-B1F6, AEIO-360-B1G6, AEIO-360-B2F, AEIO-360-B2F6, AEIO-360-B4A, AEIO-360-H1A, O-540-A4D5, O-540-B2B5, O-540-B2C5, O-540-B2C5D, O-540-B4B5, O-320, IO-320, AEIO-320, AIO-320, LIO-320, O-360, IO-360, HO-360, HIO-360, AEIO-360, AEIO-540, IO-540, TIO-360, LTO-360, IHO-360, O-540
Serial-conditional — narrows to serials 1–9879.
Part-conditional — AEL65102, AEL65099, AEL65102-NST04, AEL65102-NST05, AEL65102-NST06, AEL65102-NST07, AEL65102-NST08, AEL65102-NST10.

Applies only to engines with Engine Components Inc. (ECi) cylinder assemblies, P/N AEL65102 series 'Classic Cast', casting P/N AEL65099, serial numbers 1 through 9879, installed. Table 1 maps each cylinder head P/N variant (NST04-NST12) to its affected engine models.

Whether AD 2005-26-10 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 2005-26-10 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.