Is AD 2013-27635 a recurring Airworthiness Directive?

No — AD 2013-27635 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2013-27635 apply to?

AD 2013-27635 applies to Erickson Air-Crane — models S-64E, S-64F, S-64. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2013-27635

one-time

AD 2013-27635 · 2013-11-22 · airframe

Airworthiness Directives; Erickson Air-Crane Incorporated Helicopters (Type Certificate Previously Held by Sikorsky Aircraft Corporation)

What this AD requires

We are superseding airworthiness directive (AD) 90-26-12 for Sikorsky Aircraft Corporation (Sikorsky) Model S-64E helicopters. AD 90-26-12 required checks of the main rotor blades for a crack. This new AD retains the actions required by AD 90-26-12, reflects that the type certificate (TC) for this model helicopter has been transferred to Erickson Air-Crane Incorporated (Erickson), and expands the applicability to include the similar Erickson Model S-64F helicopters. This AD is prompted by a need to expand the applicability to include Model S-64F helicopters and clarify the applicable main rotor blades by part number. These actions are intended to detect a crack in the main rotor blade and prevent blade separation and subsequent loss of control of the helicopter.

Which aircraft AD 2013-27635 applies to

MakesErickson Air-Crane

ModelsS-64E, S-64F, S-64

Part-conditional — 6415-20201-043, 6415-20201-045, 6415-20201-047, 6415-20201-048, 6415-20201-049, 6415-20201-050, 6415-20201-051, 6415-20601-041.

Applies only to helicopters with a rotary wing blade assembly (main rotor blade) of the specified part numbers installed.

Whether AD 2013-27635 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

Supersession

Supersedes AD 90-26-12.

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 2013-27635 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.