83-13-09 R1: Interphone Audio System Modification

83-13-09 R1 McDONNELL DOUGLAS: Amendment 39-4679 as amended by Amendment 39-4744. Applies to certain McDonnell Douglas DC-10-15 and DC-10-30 airplanes, and all KC-10A airplanes, certified in all categories, which are listed in McDonnell Douglas DC-10 Service Bulletin 23-46, dated May 12, 1983, or later revisions approved by the Manager, Los Angeles Aircraft Certification Office, Compliance required within 30 days from the effective date of this AD unless already accomplished. \n\n\tTo prevent loss of communication transmission capability from airplane to ground, accomplish the following: \n\n\tA.\tModify the service and flight interphone audio system wiring in accordance with the Accomplishment Instructions in McDonnell Douglas DC-10 Service Bulletin No. 23-46, dated May 12, 1983, or later revisions approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region. \n\n\tB.\tAlternate 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. \n\n\tC.\tSpecial flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of modifications required by this AD. \n\n\tAll 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 FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Los Angeles Aircraft Certification Office, 4344 Donald Douglas Drive, Long Beach, California. \n\n\tAmendment 39-4679 became effective July 18, 1983. \n\n\tThis Amendment 39-4744 becomes effective October 27, 1983.