COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES SAAB SF340 Series Aeroplanes AD/SF340/20 Autopilot Wiring 2/91 Applicability: SAAB SF340A S/No's 079 thru 159. SAAB SF 340B S/No's 160 thru 199. Requirement: Modify as appropriate in accordance with LFV (Swedish) AD 1-041. Note: SAAB-SCANIA SB SAAB 340-34-068 also refers. Compliance: Prior to 1st June 1991. Background: Wire FD 574-24 must be replaced with a 20 AWG sized wire to ensure correct circuit co-ordination is maintained.