78-08-05 MCDONNELL DOUGLAS: Amendment 39-3184. Applies to DC-10-10, -10F, -30, -30F and -40 Series airplanes certificated in all categories, that are equipped with Litton -51 or Litton -72 Inertial Navigation Systems or Litton -58 Inertial Sensor Systems. Airplanes which are equipped with these Litton inertial systems after the effective date of this AD must be modified as defined herein prior to installation of the inertial systems. \n\n\tCompliance is required as indicated unless already accomplished. \n\n\tTo prevent simultaneous loss of primary attitude and heading information during takeoff roll and subsequent flight accomplish the following: \n\n\t(a)\tOn or before July 31, 1979 unless already accomplished, or unless incorporated in production, modify the airplane's navigation rack in accordance with McDonnell Douglas DC-10 Service Bulletin 25-251 dated August 26, 1977, or later FAA approved revisions. \n\n\t(b)\tEquivalent modifications, procedures, or revisions may be used whenapproved by the Chief, Aircraft Engineering Division, FAA Western Region. \n\n\t(c)\tSpecial flight permits may be issued in accordance with FAR's 21.197 and 21.199 to operate airplanes to a base for accomplishment of the modification required by this AD. \n\n\tThis amendment becomes effective May 16, 1978.