COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 210 Series Aeroplanes AD/CESSNA 210/38 Amdt 1 Vented Fuel Caps - Installation 8/80 Applicability: Models 210 and T210 with S/Nos. 616, 618, 57001 to 57575, 21057576 to 21059361 and T210-0001 to T210-0454. Requirement: Install vented fuel cap(s) in accordance with: 1. Cessna SL No. SE77-6; or 2. FAA AD 79-10-14, Amendment 39-3475. Note: Installation of a placard is not an acceptable alternative to installation of vented fuel caps. Compliance: Within 100 hours time in service after 31 August 1979; OR Before 1 January 1980; whichever is the later. Background: To guard against the possibility of either an obstructed primary vent or sticking of the fuel tank vent valve it has been found necessary to provide secondary venting in the form of vented fuel caps. Due to some misinterpretation of this Directive a note has now been added to disallow the fitting of a placard.