COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Casa 212 Series Aeroplanes AD/CASA/17 MLG Shock Absorber 3/95 Applicability: All Model C-212 aircraft. Requirement: Action in accordance with the technical requirements of Spanish DGAC AD 07/94. Note: CASA SB 212-32-38 refers. Compliance: As specified in the Requirement Document with a revised effective date of 2 March 1995. Background: The DGAC requires the incorporation of a modification which improves the attachment of the restrictor piston on the sliding tube in the MLG shock absorbers, by increasing from one to three the number of screw pins installed.