AD 78-08-05

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.

Compliance is required as indicated unless already accomplished.

To prevent simultaneous loss of primary attitude and heading information during takeoff roll and subsequent flight accomplish the following:

(a) On 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.

(b) Equivalent modifications, procedures, or revisions may be used whenapproved by the Chief, Aircraft Engineering Division, FAA Western Region.

(c) Special 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.

This amendment becomes effective May 16, 1978.