2002-01-28: Propeller Hub

2002-01-28 Dowty Aerospace Propellers: Amendment 39-12623. Docket No. 2001-NE-50-AD. Applicability This airworthiness directive (AD) is applicable to Dowty Aerospace Propellers, Type R334/4-82-F/13, with propeller hub assemblies, part number (P/N) 660709201. These propeller hub assemblies are installed on, but not limited to, Construcciones Aeronauticas, S.A. (CASA) 212 airplanes. Note 1: This AD applies to each propeller identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For propellers that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (d) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressedby this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it. Compliance Compliance with this AD is required as indicated, unless already done. To prevent propeller hub failure due to cracks in the hub, which could result in loss of control of the airplane, do the following: Hub Inspection (a) Within 50 flight hours time-in-service (TIS) after the effective date of this AD, or within 60 days after the effective date of this AD, whichever occurs earlier, perform an ultrasonic inspection of the rear wall of the rear half of the propeller hub for cracks in accordance with Appendix A of Dowty Aerospace Propellers Service Bulletin (SB) No. 61-1119, Revision 2, dated December 6, 2001. Inspection Reporting Requirements (b) Record the initial inspection data on a copy of Appendix B, of Dowty Aerospace Propellers SB No. 61-1119, Revision 2, dated December 6, 2001, and report the findings to the Manager, Boston Aircraft Certification Office (ACO), FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803-5299 within 10 days after the inspection. Reporting requirements have been approved by the Office of Management and Budget (OMB) and assigned OMB control number 2120-0056. Alternative Methods of Compliance (c) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Boston ACO. Operators must submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Boston ACO. Note 2: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Boston ACO. Special Flight Permits (d) Special flight permits may be issued in accordance with Secs. 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be done. Documents That Have Been Incorporated By Reference (e) The inspection must be done in accordance with the following Dowty Aerospace Propellers service bulletin (SB): Document No. Pages Revision Date SB No. 61-1119 1-2 2 December 6, 2001 Appendix A 1 1 November 27, 2001. 2 Original November 1, 2001. 3-6 1 November 27, 2001. Appendix B All Original November 1, 2001. Appendix C All Original November 27, 2001. Appendix D All Original December 6, 2001. Total pages: 29 This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Dowty Propellers, Anson Business Park, Cheltenham Road East, Gloucester GL2 9QN, UK; telephone 44 (0) 1452 716000; fax 44 (0) 1452 716001. This information may be examined, by appointment, at the FAA, New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA; or at the Office of the Federal Register, 800 North Capitol Street, NW, suite 700, Washington, DC. Note 3: The subject of this AD is addressed in Civil Aviation Authority airworthiness directive AD 003-11-2001 dated November 30, 2001. (f) This amendment becomes effective on February 14, 2002.