96-13-03: Structural Integrity

96-13-03 MCDONNELL DOUGLAS: Amendment 39-9671. Docket 94-NM-195-AD. Supersedes AD 94-03-01, Amendment 39-8807 which superseded AD 87-14-07 R1, Amendment 39-6019. \n\n\tApplicability: Model DC-9-10, -20, -30, -40, -50, and C-9 (military) series airplanes; certificated in any category. \n\n\tCompliance: Required as indicated, unless accomplished previously. \n\n\tTo ensure the continuing structural integrity of these airplanes, accomplish the following: \n\n\t(a)\tWithin 6 months after March 14, 1994 (the effective date of AD 94-03-01, amendment 39-8807), incorporate a revision into the FAA-approved maintenance inspection program which provides for inspection(s) of the Principal Structural Elements (PSE) defined in McDonnell Douglas Report No. L26-008, "DC-9 Supplemental Inspection Document (SID)," Section 2 of Volume I of Revision 3, dated April 1991, in accordance with Section 2 of Volume III-92, dated July 1992, of the SID. \n\n\t\t(1)\tVisual inspections of all PSE's on airplanes listed in Volume III-92, dated July 1992, of the SID planning data, are required by the fleet leader-operator sampling (FLOS) program at least once during the interval between the start date (SDATE) and the end date (EDATE) established for each PSE. These visual inspections are defined in Section 3 of Volume II, dated April 1991, of the SID, and are required only for those airplanes that have not been inspected previously in accordance with Section 2 of Volume II, dated April 1991, of the SID. \n\n\t\t(2)\tThe Non Destructive Inspection (NDI) techniques set forth in Section 2 of Volume II, dated April 1991, of the SID provide acceptable methods for accomplishing the inspections required by this paragraph. \n\n\t\t(3)\tAll inspection results (negative or positive) must be reported to McDonnell Douglas, in accordance with the instructions contained in Section 2 of Volume III-92, dated July 1992, of the SID. Information collection requirements contained in this regulation 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. \n\n\tNOTE 1: Volume II, dated April 1991, of the SID is comprised of the following: \n\n\nVolume Designation\n\nRevision Level Shown on Volume\nVolume II-10/20\n3 \nVolume II-20/30\n4 \nVolume II-40\n3 \nVolume II-50\n3 \n\n\tNOTE 2: NDI inspections accomplished in accordance with the following Volume II of the SID provide acceptable methods for accomplishing the inspections required by this paragraph: \n\n\nVolume Designation\t\nRevision Level\t\nDate of Revision \n\nVolume II-10/20\t\t\nVolume II-10/20\t\t\nVolume II-10/20\t\nVolume II/20\t\n3\n2\n1\nOriginal\t\nApril 1991\nApril 1990\nJune 1989\nNovember 1987\n \nVolume II-20/30\t\t\nVolume II-20/30\t\t\nVolume II-20/30\t\t\nVolume II-20/30\t\t\n4\n3\n2\n1\nApril 1991\nApril 1990 \nJune 1989\nNovember 1987 \n\nVolume II-40\t\t\nVolume II-40\t\t\nVolume II-40\t\t\nVolume II-403\n2\n1\nOriginal\nApril 1991\nApril 1990\nJune 1989\nNovember 1987 \nVolume II-50\t\t\nVolume II-50\t\t\nVolume II-50\t\t\nVolume II-50\t\n\n3\n2\n1\nOriginal\t\nApril 1991 \nApril 1990 \nJune 1989 \nNovember 1987\n\n\t(b)\tWithin 6 months after the effective date of this AD, replace the revision of the FAA-approved maintenance inspection program required by paragraph (a) of this AD, with a revision that provides for inspection(s) of the PSE's defined in McDonnell Douglas Report No. L26- 008, "DC-9 Supplemental Inspection Document (SID)," Section 2 of Volume I of McDonnell Douglas Report No. L26-008, "DC-9 Supplemental Inspection Document (SID)," Revision 4, dated July 1993, in accordance with Section 2 of Volume III-95, dated September 1995, of the SID. \n\n\tNOTE 3: Operators should note that certain visual inspections of FLOS PSE's that were previously specified in earlier revisions of Volume III of the SID are no longer specified in Volume III-95 of the SID. \n\n\t\t(1)\tPrior to reaching the threshold (Nth), but no earlier than one-half of the threshold (Nth/2), specified for all PSE's listed in Volume III-95, dated September 1995, of the SID, inspect each PSE sample in accordance with the NDI procedures set forth in Section 2 of Volume II, dated July 1993. Thereafter, repeat the inspection for that PSE at intervals not to exceed DNDI/2 of the NDI procedure that is specified in Volume III-95, dated September 1995, of the SID. \n\n\t\t(2)\tThe NDI techniques set forth in Section 2 of Volume II, dated July 1993, of the SID provide acceptable methods for accomplishing the inspections required by this paragraph. \n\n\t\t(3)\tAll inspection results (negative or positive) must be reported to McDonnell Douglas, in accordance with the instructions contained in Section 2 of Volume III-95, dated September 1995, of the SID. Information collection requirements contained in this regulation 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. \n\n\tNOTE 4: Volume II, dated July 1993, of the SID is comprised of the following: \n\n\nVolume Designation\t\nRevision Level Shown on Volume \n\nVolume II-10/20\n4 \nVolume II-20/30\n5 \nVolume II-40\n4 \nVolume II-50\n4 \n\n\tNOTE 5: NDI inspections accomplished in accordance with the following Volume II of the SID provide acceptable methods for accomplishing the inspections required by this paragraph: \n\n\nVolume Designation\n\t\nRevision Level\t\nDate of Revision \nVolume II-10/20\nVolume II-10/20\nVolume II-10/20\t\nVolume II-10/20\nVolume II/20\n4\n3\n2\n1\nOriginal\nJuly 1993\nApril 1991 \nApril 1990 \nJune 1989 \nNovember 1987 \n\nVolume II-20/30\t\nVolume II-20/30\nVolume II-20/30\t\nVolume II-20/30\nVolume II-20/30\t\n5\n4\n3\n2\n1\nJuly 1993 \nApril 1991 \nApril 1990 \nJune 1989 \nNovember 1987 \n\nVolume II-40\nVolume II-40\nVolume II-40\nVolume II-40\nVolume II-40\n4\n3\n21\nOriginal\nJuly 1993 \nApril 1991 \nApril 1990 \nJune 1989 \nNovember 1987\n\nVolume II-50\nVolume II-50\nVolume II-50\nVolume II-50\nVolume II-50\n\n4\n3\n2\n1\nOriginal\nJuly 1993 \nApril 1991 \nApril 1990 \nJune 1989 \nNovember 1987 \n \n\n\t(c)\tAny cracked structure detected during the inspections required by either paragraph (a) or (b) of this AD must be repaired before further flight, in accordance with a method approved by the Manager, Los Angeles Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate. \n\n\tNOTE 6: Requests for approval of any PSE repair that would affect the FAA-approved maintenance inspection program that is required by this AD should include a damage tolerance assessment for that PSE. \n\n\t(d)\t(1)\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, Los Angeles 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, Los Angeles ACO. \n\n\t(d)\t(2)\tAlternative methods of compliance, approved in accordance with AD 94-03-01, amendment 39-8807, are approved as alternative methods of compliance with this AD. \n\n\tNOTE 7: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Los Angeles ACO. \n\n\t(e)\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(f)\tThe actions shall be done in accordance with McDonnell Douglas Report No. L26-008, "DC-9 Supplemental Inspection Document (SID)," Volume III-92, dated July 1992; or McDonnell Douglas Report No. L26-008, "DC-9 Supplemental Inspection Document (SID)," Volume III-95, dated September 1995; as applicable. (NOTE: The issue/publication date of Volume III-95 is indicated on the Record of Revisions page.) The incorporation by reference of McDonnell Douglas Report No. L26-008, "DC-9 Supplemental Inspection Document (SID)," Volume III-95, dated September 1995, is approved by the Director of the Federal Register in accordance with 5 U.S.C.-552(a) and 1 CFR part 51. The incorporation by reference of McDonnell Douglas Report No. L26-008, "DC-9 Supplemental Inspection Document (SID)," Volume III-92, dated July 1992, was approved previously by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51 as of March 14, 1994 (59 FR 6538, February 11, 1994). Copies may be obtained from McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Technical Publications Business Administration, Department C1-L51 (2-60). Copies may be inspected at the FAA, Transport AirplaneDirectorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, Los Angeles Aircraft Certification Office, Transport Airplane Directorate, 3960 Paramount Boulevard, Lakewood, California; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. \n\n\t(g)\tThis amendment becomes effective on July 24, 1996.