Downloaded from https://www.everyspec.com ADS-39A (HDBK) 3.1. This attachment currently contains requirements for drive system components and assemblies used on the UH-60 Black Hawk, AH-64 Apache, and CH-47D Chinook helicopters. Requirements for drive system components and assemblies on other aircraft should be taken from ADS-39 dated 8 November 1989. Future updates to this Attachment will contain requirements for the remaining aircraft. When a component or assembly is listed in both this ADS and ADS-39 dated 8 November 1989, the requirements of this ADS shall take precedence.
4 Other Requirements 4.1 When Code OT is used in Column 15 of this Attachment, or when a component or assembly is not listed in either this ADS or ADS-39 dated 8 November 1989, requirements may be obtained by contacting USA ATCOM ATTN: AMSAT-R-EPD (ADS-39) 4300 Goodfellow Blvd. St. Louis MO 63120-1798 Phone: 314-263-0308 or DSN 693-0308 2