AD 84-03-07

84-03-07 McDONNELL DOUGLAS: Amendment 39-4807. Applies to McDonnell Douglas Model DC-10 and KC-10A (Military) series airplanes, incorporating a horizontal stabilizer single chain differential drive system, certificated in all categories. Compliance required within 6 months after the effective date of this AD, unless previously accomplished.

To prevent uncommanded movement of the horizontal stabilizer following fused drive system shear pin failure, accomplish the following:

A. Modify the horizontal stabilizer drive assembly in accordance with Section 2, Accomplishment Instructions, of McDonnell Douglas DC-10 Service Bulletin 27-192, Revision 1, dated August 1, 1983, or later revision approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region.

NOTE: No additional work is required for those operators who accomplished the original issue of McDonnell Douglas DC-10 Service Bulletin 27-192, dated March 17, 1983.

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

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

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 March 19, 1984.