COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 19, 23 and 24 Series Aeroplanes AD/BEECH 23/1 Cabin Door Hinge 4/63 Applicability: Model 23 with S/Nos. M-50 to M-174, M-177, M-182 and M-189 except M-79, M- 108, M-131, M-132, M-166, M-172. Requirement: Action in accordance with Beechcraft SB Model 23 No. 6. Compliance: Before 1 September 1971.