Is AD 90-26-12 a recurring Airworthiness Directive?

No — AD 90-26-12 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 90-26-12 apply to?

AD 90-26-12 applies to Erickson Air-Crane Company, Sikorsky Aircraft — models S-64E, S-64. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 90-26-12

one-time

AD 90-26-12 · 1990-01-01 · airframe

Airworthiness Directives; Administration, 12 New England Executive Park, Burlington, Massachusetts 01803. This amendment (39-6841, AD 90-26-12) becomes effe

Which aircraft AD 90-26-12 applies to

MakesErickson Air-Crane CompanySikorsky Aircraft

ModelsS-64E, S-64

Applicability read from the AD teaser — confirm exact model/serial from the records.

Whether AD 90-26-12 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

Supersession

Superseded by AD 2013-27635 — comply with the superseding directive.

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 90-26-12 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 →

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.