Airworthiness Directive 2005-10-13
one-timeAirworthiness Directives; Rolls-Royce Corporation (Formerly Allison Engine Company) 250-B17B, -B17C, -B17D, -B17E, -C20, -C20B, -C20F, -C20J, -C20S, and -C20W Turboprop and Turboshaft Engines
What this AD requires
The FAA is adopting a new airworthiness directive (AD) for Rolls- Royce Corporation (RRC) (formerly Allison Engine Company) 250-B17B, - B17C, -B17D, -B17E, -C20, -C20B, -C20F, -C20J, -C20S, and -C20W turboprop and turboshaft engines that do not have turbine energy absorbing ring, RRC part number (P/N) 23035175, or an equivalent FAA- approved serviceable turbine energy absorbing ring, installed. This AD requires installation of a turbine energy absorbing ring in the plane of the 1st stage turbine wheel. This AD results from an unacceptable rate of uncontained 1st stage turbine wheel failures. We are issuing this AD to minimize the risk of uncontained 1st stage turbine wheel fragments from causing damage to the aircraft or damage to the second engine on twin-engine installations, which could lead to loss of control and loss of the aircraft.
Which aircraft AD 2005-10-13 applies to
Manufacturer formerly Allison Engine Company. Applies only to engines that do NOT have turbine energy absorbing ring, RRC P/N 23035175, or an FAA-approved equivalent serviceable ring, installed. Covers both turboprop and turboshaft applications; installed on, but not limited to, Agusta A109/A109A/A109A II, B-N Group BN-2T (turboprop), Bell 206A/206B/206L, Bell 47G-2A/2A-1/3B/3B-1/3B-2/3B-2A/4/4A/5/5A (various STCs), Eurocopter Deutschland BO-105C/S, Eurocopter France AS355E/F/F1/F2, FH-1100, Hiller UH-12D, MDHI 369D/E/HM/HS/HE, Rogerson Hiller UH-12E/UH-12E-L, and SIAI Marchetti SF600 aircraft.
Whether AD 2005-10-13 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:
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.