AD 2001-24-10 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, certificated in any category, equipped with Messier-Dowty main landing gear units having part numbers (P/N) 201072011, 201072012, 201072013, 201072014, 201072015, or 201072016, that include main fitting subassemblies having P/Ns 201072283, 201072284, or 201251258 (main fittings having P/Ns 201072383, 201072384, or 201072389). 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 requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (f) 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. Note 2: This AD references Messier-Dowty Service Bulletin No. F100-32-101, including Appendices A and B, dated October 25, 2001, which is not referenced in Dutch airworthiness directive BLA 2001-080, dated June 29, 2001. In addition, this AD specifies additional inspections that are beyond those included in the service bulletin. Where there are differences between the AD and the service information, the AD prevails. To detect forging defects of the main landing gear (MLG), which could lead to cracking and result in significant structural damage to the airplane and possible injury to the occupants, accomplish the following: Initial and Repetitive Inspections (a) Before the accumulation of 1,000 total landings on a new MLG, or within 30 days after the effective date of this AD, whichever occurs later: Do an initial eddy current inspection on all MLG main fittings to detect forging defects per Messier-Dowty Service Bulletin No. F100-32-101, including Appendices A and B, dated October 25, 2001. After accomplishment of the initial inspection, repeat the inspection thereafter at intervals not to exceed 500 landings or 6 months, whichever occurs first, per the service bulletin. Rework (b) After any inspection required by paragraph (a) of this AD, before further flight, accomplish the applicable actions required by paragraph (b)(1) or (b)(2) of this AD. (1) If any cracking is found within the limits specified in Messier-Dowty Service Bulletin No. F100-32-101, including Appendices A and B, dated October 25, 2001: Rework the MLG main fitting per the service bulletin. (2) If any cracking is found that exceeds the limits specified in Messier-Dowty Service Bulletin No. F100-32-101, including Appendices A and B, dated October 25, 2001: Rework the MLG main fitting per a method approved by the Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA; or the Civil Aviation Authority “ The Netherlands (CAA-NL) (or its delegated agent). Exception to Service Information (c) During any action required by this AD, if the service bulletin specifies to contact Messier-Dowty for an appropriate action: Before further flight, repair per a method approved by the Manager, International Branch, ANM-116; or the CAA-NL (or its delegated agent). Reporting Requirement (d) Within 7 days after accomplishing any inspection required by paragraph (a) of this AD: Submit a report of the inspection findings (positive and negative) to Fokker Services B.V, Technical Services Dept., P.O. Box 231, 2150 AE Nieuw-Vennep, the Netherlands, fax number 31 (0) 252 627211. The report must include MLG crack indication, part number, serial number, crack depth and length, and a description of any rework of the MLG main fittings accomplished. Information collection requirements contained in this AD have been approved by the Office of Management and Budget (OMB) under the provisions of the Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq. ) and have been assigned OMB Control Number 2120-0056. Spares (e) As of the effective date of this AD, no person shall install on any airplane, an MLG main fitting or main fitting subassembly having a part number specified in Paragraph 1.A of the “Effectivity” in Messier-Dowty Service Bulletin No. F100-32-101, including Appendices A and B, dated October 25, 2001, unless the MLG fitting has been inspected, and the rework actions accomplished if necessary, per the service bulletin. Alternative Methods of Compliance (f) 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. Special Flight Permits (g) 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. Incorporation by Reference (h) Except for the actions required by paragraphs (b)(2) and (c) of this AD, the actions shall be done in accordance with Messier-Dowty Service Bulletin No. F100-32-101, including Appendices A and B, dated October 25, 2001. 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., P.O. Box 231, 2150 AE Nieuw-Vennep, the Netherlands. 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 BLA 2001-080, dated June 29, 2001. Effective Date (i) This amendment becomes effective on December 20, 2001. Issued in Renton, Washington, on November 26, 2001. Vi L. Lipski, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 01-30081 Filed 12-4-01; 8:45 am] BILLING CODE 4910-13-U