94-15-12: Supplemental Structure Inspection

94-15-12 BOEING: Amendment 39-8983. Docket 94-NM-68-AD. Supersedes AD 86-19-01, amendment 39-5394. \n\n\tApplicability: Model 747-100SR series airplanes having line numbers 346, 351, 420, 426, 427, and 601; certificated in any category. \n\n\tNOTE: The airplanes listed as the "747-100SR Candidate Airplanes" on page 2 of Section 3.0 of Boeing Document D6-35655, "Supplemental Structural Inspection Document for 747-100SR," dated April 2, 1986, are not subject to the requirements of this AD. \n\n\tCompliance: Required as indicated, unless accomplished previously. \n\n\tTo ensure continued structural integrity of the total fleet of these airplanes, accomplish the following: \n\n\t(a)\tWithin one year after the effective date of this AD, incorporate a revision into the FAA- approved maintenance inspection program which provides no less than the required damage tolerance rating (DTR) for each Structural Significant Item (SSI) as listed in Boeing Document D6-35655, "Supplemental StructuralInspection Document for 747-100SR," dated April 2, 1986. The revision to the maintenance program must include and be implemented in accordance with the procedures specified in sections 5.0 and 6.0 of the Document. \n\n\t(b)\tCracked structure must be repaired prior to further flight, in accordance with an FAA- approved method. \n\n\t(c)\tAn 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, Seattle Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Seattle ACO. \n\n\tNOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Seattle ACO. \n\n\t(d)\tSpecial 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. \n\n\t(e)\tThe incorporation of the revision to the maintenance program shall be done in accordance with Boeing Document No. D6-35655, "Supplemental Structural Inspection Document for 747-100SR," dated April 2, 1986, which contains the following list of effective pages: \n\n\n\n Page Number\t\nRevision Letter\nShown on Page \nList of Active Pages\nSection A,\nPages 1-11\n\n\n(None) \n\nThis 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 Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124-2207. 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. \n\n\t(f)This amendment becomes effective on August 10, 1994.