Is AD E6-15958 a recurring Airworthiness Directive?

No — AD E6-15958 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD E6-15958 apply to?

AD E6-15958 applies to Lycoming — models O-540-J3C5D, O-540-L3C5D, O-360, LO-360, IO-360, LIO-360, AEIO-360, O-540. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive E6-15958

one-time

AD E6-15958 · 2006-09-29 · reciprocating engine

Airworthiness Directives; 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.

What this AD requires

The FAA is adopting a new 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. This AD requires replacing certain crankshafts. This AD results from reports of 23 confirmed failures of similar crankshafts in Lycoming Engines 360 and 540 series reciprocating engines. 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 E6-15958 applies to

MakesLycoming

ModelsO-540-J3C5D, O-540-L3C5D, O-360, LO-360, IO-360, LIO-360, AEIO-360, O-540, IO-540, AEIO-540, TIO-540, LTIO-540, IO-580, IO-720

Whether AD E6-15958 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 E6-15958 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.