COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES British Aerospace BAe 3100 (Jetstream) Series Aeroplanes AD/JETSTREAM/66 Wing - Main Spar Fuel Fitting Attachment Holes Applicability: Jetstream 3200 Series aircraft up to and including constructor's number 950. 10/94 Requirement: Modify the fuel tank drainage hole at wing station 64.8 on the left and right hand sides in accordance with British Aerospace SB 57-JM 8175 revision 1. Compliance: Prior to 6000 landings or before 15 March 1995 whichever is the later. Background: Cracking of the wing main spar webs has been found at this location on the Jetstream 3200 series wing test specimen.