COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Casa 212 Series Aeroplanes AD/CASA/3 Wing Flap Control Hinge Bearing - Replacement 3/83 Applicability: All models CASA-212 with S/Nos. referenced in the requirement document. Document: Construcciones Aeronauticas SB 212-27-19. Compliance: Within 100 hours time in service after 31 March 1983 unless previously accomplished. Background: The manufacturer reports breakage and corrosion of premod bearings.