Is AD 2011-18168 a recurring Airworthiness Directive?

No — AD 2011-18168 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 2011-18168

Q: Which aircraft does AD 2011-18168 apply to?

AD 2011-18168 applies to Lycoming, Superior Air Parts — models AEIO-320, AIO-320, IO-320, LIO-320, AEIO-360, AIO-360, HIO-360, IO-360. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 2011-18168 · 2011-08-01 · reciprocating engine

Airworthiness Directives; Superior Air Parts and Lycoming Engines (Formerly Textron Lycoming) Fuel-Injected Engines

What this AD requires

We are adopting a new airworthiness directive (AD) for certain Superior Air Parts and Lycoming (formerly Textron Lycoming) fuel- injected engines. This AD requires removing from service, certain fuel servos. This AD was prompted by an accident involving a Piper PA32R- 301. We are issuing this AD to correct the unsafe condition on these products.

Which aircraft AD 2011-18168 applies to

MakesLycomingSuperior Air Parts

ModelsAEIO-320, AIO-320, IO-320, LIO-320, AEIO-360, AIO-360, HIO-360, IO-360, LIO-360, TIO-360, IO-540, IGO-480, AEIO-540, IVO-540, TIO-540

Part-conditional — AV2541801, AV2541803.

Applies only to the listed Lycoming and Superior Air Parts engine models that have an AVStar Fuel Systems (AFS) fuel servo diaphragm, part number AV2541801 or AV2541803, installed.

Whether AD 2011-18168 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 2011-18168 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.