COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Casa 212 Series Aeroplanes AD/CASA/21 Corrosion Prevention and Control Programme (CPCP) 9/96 Applicability: All models. Requirement: Action in accordance with Document CPCP C-212-PV01 dated 31 March 1995 issued by "Construccions Aeronauticas". Note: Spanish DGAC AD 01/96 refers. Compliance: For aircraft less than 15 years since build at 15 August 1996: Initial completion of tasks defined in the Requirement Document for each aircraft area must occur in a period not exceeding the interval established in the Requirement Document, beginning at no later than 15 August 1997; or at the implementation age specified in the Requirement Document; whichever occurs last. Thereafter at intervals not to exceed those specified in the Requirement Document. For aircraft greater than 15 years since build at 15 August 1996: Initial completion of all tasks defined in the Requirement Document must be completed within the four years following 15 August 1997, or within the periods specified in the Requirement document; whichever occurs first. Thereafter at intervals not to exceed those specified in the Requirement Document. Background: This Directive arises from the work carried out by the internationally sponsored Ageing Aircraft Working Group now known as the Airworthiness Assurance Task Force.