Is AD 2013-24955 a recurring Airworthiness Directive?

Yes — AD 2013-24955 requires a repetitive inspection every 200 hours. Next-due depends on the aircraft's time in service.

Which aircraft does AD 2013-24955 apply to?

AD 2013-24955 applies to Sikorsky, Erickson Air-Crane — models CH-54A, S-64E, CH-54, S-64. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2013-24955

recurring

AD 2013-24955 · 2013-10-31 · airframe

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

What this AD requires

We are superseding Airworthiness Directive (AD) 97-19-10 for Sikorsky Aircraft Corporation-manufactured Model S-64E helicopters (type certificate currently held by Erickson Air-Crane Incorporated (Erickson)). AD 97-19-10 required inspecting and reworking the main gearbox (MGB) assembly second stage lower planetary plate (plate). This action establishes or reduces the life limits for certain flight- critical components, removes from service various parts, requires repetitive inspections and other corrective actions, and requires replacing any cracked part discovered during an inspection. This AD is prompted by further analysis performed by the current type certificate holder and the service history of certain parts. The actions specified in this AD are intended to prevent a crack in a flight critical component, failure of a critical part, and subsequent loss of control of the helicopter.

Repetitive inspection. Re-inspect every 200 hours. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2013-24955 applies to

MakesSikorskyErickson Air-Crane

ModelsCH-54A, S-64E, CH-54, S-64

Originally Sikorsky Model CH-54A, now under the Erickson Air-Crane Model S-64E type certificate.

Whether AD 2013-24955 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 97-19-10.

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 2013-24955 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.