AD 85-22-01

85-22-01 McDONNELL DOUGLAS: Amendment 39-5157. Applies to McDonnell Douglas Model DC-10-10, -15, -30, -40, and KC-10A (Military) series airplanes, Fuselage Numbers 1 through 388, certificated in any category. Compliance required as indicated, unless previously accomplished.

To prevent loss of engine as a result of loose engine mount bolts, accomplish the following:

A. Within 30 days after the effective date of this AD, inspect the engine-to-pylon forward and aft mount for proper clamping and inspect engine mount bolts in accordance with Accomplishment Instructions in McDonnell Douglas DC-10 Alert Service Bulletin A71-133, dated September 20, 1985, or later FAA-approved revision. For newly installed engines, the initial inspection may be 90 days from the date of installation or 30 days after the effective date of this AD whichever is later.

B. If a gap greater than .002 inch is found, before further flight, remove and replace bolts and nuts in accordance with Accomplishment Instructions in McDonnell Douglas DC-10 Alert Service Bulletin A71-133, dated September 20, 1985, or later FAA-approved revision.

C. For mounts with no gap larger than .002 inch or for mounts with bolts and nuts replaced in accordance with paragraph B., above, ensure that bolts are torqued within proper limits and that torque stripes are painted. Conduct an inspection for torque stripe alignment and take corrective action, as necessary, at intervals not to exceed 90 days, in accordance with Accomplishment Instructions of McDonnell Douglas DC-10 Alert Service Bulletin A73-133, dated September 20, 1985, or later FAA-approved revision.

D. The repetitive inspections required by paragraph C., above, may be discontinued after the engine-to-pylon forward and aft mounts are modified in accordance with McDonnell Douglas DC-10 Service Bulletin 71-133, Revision 3, dated July 17, 1985, or later FAA-approved revision.

E. Alternate means of compliance with this AD which provide an acceptable level of safety may be used when approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region.

F. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a base for accomplishment of inspections required by this AD.

All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Director, Publications and Training, C1-750 (54-60). These documents also may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Los Angeles Aircraft Certification Office, 4344 Donald Douglas Drive, Long Beach, California.

This amendment becomes effective November 4, 1985.