COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 18 Series Aeroplanes AD/BEECH 18/23 Pilot Seats - Reinforcement 1/84 Applicability: All model 18 aircraft equipped with A.M.I. seats model 716-1,-2,-11, -12, -21 and -22 and Model 865-1 to -9 and-11. Requirement: Reinforce pilot seat frame assembly P/N 865J10005-1 by installation of A.M.I. Industries, Inc., seat frame brace kit P/N 865K90000-1 I.A.W. A.M.I. Industries, Inc., service bulletin No 25-10-865-01, dated 31 January, 1983. Note: FAA AD 83-21-06 refers. Compliance: Unless previously accomplished, before 30 April 1984. Background: A case occurred where failure of the pilots seats during a survivable emergency landing contributed to occupant injury. Subsequent T.S.O. tests verified failure of the seat frame at loads below the 9g. forward requirement. Federal Register of Legislative Instruments F2006B03622