95-04-07 R2: Engine Mount Bolts

95-04-07 R2 MCDONNELL DOUGLAS: Amendment 39-11354. Docket 99-NM-14-AD. Revises AD 95-04-07 R1, Amendment 39-9317. Issued September 29, 1999.\n\n\tApplicability: Model DC-10-30 and KC-10A (military) airplanes on which bolt retainers have not been installed on the engine mount in accordance with McDonnell Douglas DC-10 Service Bulletin 71-133, Revision 6, dated June 30, 1992; and all Model DC-10-10 and -15 airplanes; certificated in any category. \n\n\tNOTE 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 (d) 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. \n\n\tCompliance: Required as indicated, unless accomplished previously. \n\n\tTo prevent broken lockwires, which could result in loosening of the engine mount bolts, and subsequent separation of the engine from the airplane, accomplish the following: \n\nRestatement of Requirements of AD 95-04-07 R1, Amendment 39-9317\n\n\t(a)\tWithin 120 days after March 17, 1995 (the effective date of AD 95-04-07 R1, amendment 39-9317), unless accomplished previously within the last 750 flight hours prior to March 17, 1995, perform a visual inspection to detect broken lockwires on the forward engine mount bolts on engines 1, 2, and 3, in accordance with McDonnell Douglas Alert Service Bulletin DC10-71A159, Revision 1, dated January 31, 1995.\n\n\t\t(1)\tIf no lockwire is found broken, repeat the inspection thereafter at intervals not to exceed 750 flight hours.\n\n\t\t(2)\tIf any lockwire is found broken, prior to further flight: Check the torque of the bolt, install a new lockwire, and install a torque stripe on the bolt, in accordance with the alert service bulletin. Thereafter at intervals not to exceed 750 flight hours, perform a visual inspection to detect misalignment of the torque stripes, and repeat the inspection to detect broken lockwires, in accordance with the alert service bulletin.\n\nOptional Terminating Actions\n\n\t(b)\tFor Model DC-10-30 airplanes and KC-10A (military) airplanes only: Installation of retainers on the engine mount bolts of engines 1, 2, or 3 in accordance with the procedures depicted in Figure 6 of Revision 6 of McDonnell Douglas DC-10 Service Bulletin 71-133, dated June 30, 1992, constitutes terminating action for the requirements of this AD for that engine.\n\n\t(c)\tFor Model DC-10-10, -15, and -30 airplanes and KC-10A (military) airplanes: Modification of the forward engine mount bolts for engine 1, 2, or 3 in accordance with McDonnell Douglas Service Bulletin DC10-71-159, dated September 6, 1995, or Revision 01, dated July 28, 1997, constitutes terminating action for the requirements of this AD for that engine.\n\nAlternative Methods of Compliance\n\n\t(d)\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\tNOTE 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Los Angeles ACO.\n\nSpecial Flight Permits\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\nIncorporation by Reference\n\n\t(f)\tExcept as provided by paragraphs (b) and (c) of this AD, the actions shall be done in accordance with McDonnell Douglas Alert Service Bulletin DC10-71A159, Revision 1, dated January 31, 1995. This incorporation by reference was approved previously by the Director of the Federal Register as of March 17, 1995 (60 FR 38477, July 27, 1995). Copies may be obtained from The Boeing Company, Douglas Products Division, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Technical Publications Business Administration, Dept. C1-L51 (2-60). Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, Transport Airplane Directorate, Los Angeles Aircraft Certification Office, 3936 Paramount Boulevard, Lakewood, California.; or atthe Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. \n\n\t(g)\tThis amendment becomes effective on November 10, 1999.