75-12-03 MCDONNELL DOUGLAS: Amendment 39-2229 as amended by Amendment 39-2297. Applies to Model DC-10-10, -10F, -30, -30F airplanes certificated in all categories. \n\n\tTo maintain fire containment capability of the aft engine, and to protect against potential foreign object damage to the aft engine fan section, accomplish the following after the effective date of this AD. \n\n\tWithin the next 300 flight hours, unless already accomplished within the 600 flight hours previous to the effective date of this AD, and at intervals not to exceed 900 flight hours thereafter, accomplish the inspection and repair requirements of McDonnell Douglas Service Bulletin 71-75, dated May 16, 1975, or later FAA-approved revisions. \n\n\tThe repetitive inspections required per this AD may be discontinued when the modifications described in McDonnell Douglas Service Bulletin No. 71-73, dated July 15, 1975 or later FAA-approved revisions, are accomplished. \n\n\tEquivalent inspections and repairs may beapproved by the Chief, Aircraft Engineering Division, FAA Western Region. \n\n\tSpecial flight permits may be issued under FAR 21.197 and 21.199 for the purpose of moving the aircraft to a base to perform the inspection requirements of the AD. \n\n\tAmendment 39-2229 became effective June 6, 1975. \n\n\tThis amendment 39-2297 becomes effective August 7, 1975.