AD 98-13-32 Airworthiness Directives; Fokker Model F.28 Mark 0100 Series Airplanes

Makes named: dowty. Models named: F.28 Mark 0100 series. Read the applicability below — it usually turns on serial or part numbers too.

Model F.28 Mark 0100 series airplanes, equipped with Messier-Dowty main landing gear units having the part numbers and serial numbers specified in Messier-Dowty Service Bulletin F100- 32-86, Revision 2, dated July 3, 1997, including Appendix A, Revision 1, dated November 1, 1996, and Appendix B, Revision 1, dated November 1, 1996; certificated in any category. Note 1: This AD applies to each airplane 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 airplanes that have been modified, altered, or repaired so that the performance of the [[Page 34583]] requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (c) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.

Required as indicated, unless accomplished previously. To prevent cracking of the main fitting subassembly of the main landing gear, which could result in collapse of the main landing gear, accomplish the following: (a) Within 60 days after the effective date of this AD, perform a visual and an eddy current inspection to detect discrepancies (paint damage, corrosion or cracking) of the main fitting subassembly of the main landing gear, in accordance with Appendix B, Revision 1, dated November 1, 1996, of Messier-Dowty Service Bulletin F100-32-86, Revision 2, dated July 3, 1997. (1) If no discrepancy is detected, or if any discrepancy is detected that is within the limits specified in Appendix B of the service bulletin: Repeat the inspections required by paragraph (a) of this AD thereafter at intervals not to exceed 60 days. (2) If any discrepancy is detected that is outside the limits specified in Appendix B of the service bulletin: Prior to further flight, accomplish the requirements of paragraph (b) of this AD. (b) Within 6 months after the effective date of this AD, perform a one-time eddy current inspection and a one-time visual inspection to detect discrepancies (paint damage, corrosion, or cracking) of the main fitting subassembly of the main landing gear, in accordance with the Accomplishment Instructions of Messier-Dowty Service Bulletin F100-32-86, Revision 2, dated July 3, 1997, including Appendix A, Revision 1, dated November 1, 1996, and Appendix B, Revision 1, dated November 1, 1996. Accomplishment of the actions required by this paragraph constitutes terminating action for the requirements of this AD. (1) If no discrepancy is detected, prior to further flight, apply a protective treatment to the main fittings in accordance with the service bulletin. (2) If any discrepancy is detected that can be repaired within the limits specified in the service bulletin, prior to further flight, repair the discrepancy, and apply a protective treatment to the main fittings, in accordance with the service bulletin. (3) If any discrepancy is detected that cannot be repaired within the limits specified in the service bulletin, prior to further flight, repair in accordance with a method approved by the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate. Note 2: Accomplishment of the terminating actions required by paragraph (b) of this AD in accordance with Messier-Dowty Service Bulletin F100-32-86, including Appendix A and Appendix B; all Revision 1, all dated November 1, 1996; prior to the effective date of this AD, is acceptable for compliance with the requirements of this paragraph. (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, International Branch, ANM-116. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, International Branch, ANM-116. Note 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the International Branch, ANM-116. (d) Special flight permits may be issued in accordance with sections 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 accomplished. (e) Except as provided by paragraph (b)(3) of this AD, the actions shall be done in accordance with Messier-Dowty Service Bulletin F100-32-86, Revision 2, dated July 3, 1997, including Appendix A, Revision 1, dated November 1, 1996, and Appendix B, Revision 1, dated November 1, 1996, which contains the following list of effective pages: ------------------------------------------------------------------------ Revision level Page No. shown on Date shown on page page ------------------------------------------------------------------------ 1, 5, 6......................... 2 July 3, 1997. 2-4, 7-17....................... 1 November 1, 1996. Appendix A 1-3............................. 1 November 1, 1996. Appendix B 1-5............................. 1 November 1, 1996. ------------------------------------------------------------------------ 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 Fokker Services B.V., Technical Support Department, P.O. Box 75047, 1117 ZN Schiphol Airport, the Netherlands; or from Messier-Dowty Ltd., Cage: K0654, Cheltenham Road, Gloucester, GL2 9QH, England. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. Note 4: The subject of this AD is addressed in Dutch airworthiness directive 1996-133/2(A), dated January 31, 1997. (f) This amendment becomes effective on July 30, 1998. Issued in Renton, Washington, on June 16, 1998. Darrell M. Pederson, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 98-16498 Filed 6-24-98; 8:45 am] BILLING CODE 4910-13-U