2005-10-13: Turbine energy absorbing ring

2005-10-13 Rolls-Royce Corporation (formerly Allison Engine Company): Amendment 39-14090. Docket No. FAA-2004-19648; Directorate Identifier. 2004-NE-31-AD. Effective Date (a) This airworthiness directive (AD) becomes effective June 22, 2005. Affected ADs (b) None. Applicability (c) This AD applies to 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. These engines are installed on, but not limited to, the following aircraft: Agusta A109 Agusta A109A Agusta A109A II B-N Group BN-2T Bell 206A Bell 206B Bell 206L Bell Helicopter Textron 47G-2A (Supplemental Type Certificate (STC) SH657NW) Bell Helicopter Textron 47G-2A-1 (STC SH657NW) Bell Helicopter Textron 47G-3B (STC SH657NW) Bell Helicopter Textron 47G-3B-1 (TH-13T) (STC SH657NW) Bell Helicopter Textron 47G-3B-2 (STC SH657NW) Bell Helicopter Textron 47G-3B-2A (STC SH657NW) Bell Helicopter Textron 47G-4 (STC SH657NW) Bell Helicopter Textron 47G-4A (STC SH657NW) Bell Helicopter Textron 47G-5 (STC SH657NW) Bell Helicopter Textron 47G-5A (STC SH657NW) Eurocopter Deutchland BO-105C Eurocopter Deutchland BO-105C (STC SH218NW-D) Eurocopter Deutchland BO-105S Eurocopter France AS355E Eurocopter France AS355F Eurocopter France AS355F1 Eurocopter France AS355F2 FH-1100 Manufacturing Corp FH-1100 Hiller Aviation UH-12D (Army UH-23D) (STC SH177WE) MDHI 369D MDHI 369E MDHI 369HM MDHI 369HS MDHI 369HE Rogerson Hiller Corporation UH-12E (STC SH178WE) Rogerson Hiller Corporation UH-12E-L (STC SH178WE) SIAI Marchetti s.r.l. SF600 Unsafe Condition (d) 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. Compliance (e) You are responsible for having the actions required by this AD performed at the next time the gas producer turbine rotor is disassembled for any reason, or within 1,750 hours time-since-last- overhaul, time-since-new, time-since-last-heavy-maintenance, or time-since-last-hot section inspection after the effective date of this AD, whichever occurs first, but no later than October 31, 2011, unless already done. Required Actions (f) Install a turbine energy absorbing ring, RRC P/N 23035175, or an equivalent FAA-approved turbine energy absorbing ring, in the plane of the 1st stage turbine wheel, using paragraphs 1.M., 2.A., and 2.B. of Rolls-Royce Corporation Alert Commercial Engine Bulletin No. CEB-A-1255, Revision 4, dated September 29, 2004, to do the installation. Alternative Methods of Compliance (g) The Manager, Chicago Aircraft Certification Office, has the authority to approve alternative methods of compliance for this AD if requested using the procedures found in 14 CFR 39.19. Related Information (h) None. Material Incorporated by Reference (i) You must use Rolls-Royce Corporation Alert Commercial Engine Bulletin No. CEB-A-1255, Revision 4, dated September 29, 2004, to perform the actions required by this AD. The Director of the Federal Register approved the incorporation by reference of this service bulletin in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Rolls-Royce Corporation, P.O. Box 420, Indianapolis, IN 46206-0420; telephone (317) 230-2712; fax (317) 230-3381 for the service information identified in this AD for a copy of this service information. You may review copies at the Docket Management Facility; U.S. Department of Transportation,400 Seventh Street, SW., Nassif Building, Room PL-401, Washington, DC 20590-001, on the internet at http://dms.dot.gov, or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html .