COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes AD/AC/63 Electric Elevator Trim Speed - Modification 4/77 Applicability: Model 690A S/Nos. 11143 thru 11344 equipped with a Rockwell international installed Collins Radio Company AP 106 auto pilot (this AD does not apply to installations made in accordance with STC SA 1876 SW). Document: 1. Rockwell International SB No. 162, Rev. 1 or 2. FAA AD 77-04-01. Compliance: Part I - Before 30 April 1977. Part II - Must be accomplished prior to re-activation of manual electric trim.