COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 77 (Skipper) Series Aeroplanes AD/BEECH 77/14 Rudder Balance Weight 12/83 Applicability: All model 77 with S/Nos. WA-1 to WA-312. Requirement: 1. Inspect rudder balance weight attachments for security. 2. Modify I.A.W. Beechcraft S.I No. 1256. Compliance: 1. Within 25 hours' time in service after 4 November 1983 and thereafter at intervals not exceeding 25 hours' time in service until modified. 2. Prior to 31 December 1983. Background: To provide a reinforced attachment of the rudder balance weight.