Is AD 05-14 a recurring Airworthiness Directive?

No — AD 05-14 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 05-14

Q: Which aircraft does AD 05-14 apply to?

AD 05-14 applies to Rolls-Royce Corporation — models 250-B17, 250-B17B, 250-B17C, 250-B17D, 250-B17E, 250-C20, 250-C20B, 250-C20F. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 05-14 · 2005-01-04 · turboshaft engine

Airworthiness Directives; Rolls-Royce Corporation (formerly Allison Engine Company, Allison Gas Turbine Division, and Detroit Diesel Allison) 250-B and 250-C Series Turboprop and Turboshaft Engines

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for Rolls-Royce Corporation (RRC) 250-B and 250-C series turboprop and turboshaft engines with certain part numbers (P/Ns) of compressor adaptor couplings manufactured by Alcor Engine Company (Alcor), EXTEX Ltd. (EXTEX), RRC, and Superior Air Parts (SAP) installed. This AD requires operators to remove from service affected compressor adaptor couplings. This AD results from nine reports of engine shutdown caused by coupling failure. We are issuing this AD to reduce the risk of failure of the compressor adaptor coupling and subsequent loss of all engine power.

Which aircraft AD 05-14 applies to

MakesRolls-Royce Corporation

Models250-B17, 250-B17B, 250-B17C, 250-B17D, 250-B17E, 250-C20, 250-C20B, 250-C20F, 250-C20J, 250-C20S, 250-C20W, 250

Part-conditional — 23039791AL, 23039791AL-1, 23039791AL-2, 23039791AL-3, A23039791, E23039791, E23039791-1, E23039791-2.

250-B17 model designations are turboshaft (helicopter) configurations; 250-C20 model designations are turboprop configurations of the same core engine family. Applies only to engines with a compressor adaptor coupling installed bearing one of the part numbers listed in Table 1 (manufactured by Alcor Engine Company, EXTEX Ltd., Rolls-Royce Corporation, or Superior Air Parts). Installed on, but not limited to, Agusta A109/A109A/A109A II, Bell 206A/207B/206L, Enstrom TH-28/480/480B, Eurocopter France AS355E/AS355F/AS355F1/AS355F2, Eurocopter Deutschland BO-105C/BO-105S, MDHI 369D/369E/369H/369HM/369HS/369HE, Schweizer 269D helicopters, and B-N Group BN-2T airplanes.

Whether AD 05-14 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 05-14 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.