COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 207 Series Aeroplanes AD/CESSNA 207/23 Turbocharger 6/80 Applicability: Model 207 S/Nos. 20700001 thru 20700603. Requirement: Action in accordance with Cessna SIL No SE 80-24. Note: FAA AD 80-07-01, Amdt 39-3719 refers. Compliance: Within 100 hours time in service after 30 June 1980. Background: This Directive is issued to preclude a failure of the turbocharger anti-rotation pin and its ingestion into the scavenge pump. This in turn could cause a failure of the pressure and scavenge pump.