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 23/35 Flap Control Assembly 4/78 Applicability: All Models: 23, A23, A23A, B23 & C23 with s/Nos. M-1 to M-1979; A23-19, 19A & B19 with S/Nos. MB-1 to MB-866. A23-24 & A24 with S/Nos. MA-1 to MA-368 and A24R, B24R & C24R with S/Nos. MC-2 to MC-536. Requirement: Action in accordance with Beechcraft SI No. 0940. Note: FAA AD 78-04-01 Amdt. 39-3139 refers. Compliance: 1. Inspect at intervals not exceeding 100 hours time in service until modified. 2. Modify before 1 January 1979.