COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 207 Series Aeroplanes AD/CESSNA 207/29 Rear Wing Spar Doubler 8/85 Applicability: All model 207 with S/Nos 20700001 to 20700767 (1969 to 1983). (Normally aspirated and turbocharged models which have had a rear wing spar replaced with one shipped from Cessna Supply Division). Requirement: Action in accordance with Cessna S.B. SEB 85-9. Compliance: Within 100 hours time in service after 31 August 1985 or at the next scheduled inspection for Maintenance Release issue after 31 August 1985 whichever is the later. Background: The manufacturer suspects that a quantity of spare rear wing spar assemblies may have been shipped from the Cessna Supply Division without a doubler installed near the attach fitting.