COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Pratt and Whitney Canada Turbine Engines - PW100 Series AD/PW100/2 Amdt 1 High Pressure Rotor 4/91 Applicability: All PW100 series engines. Requirement: Action in accordance with the technical requirements of Transport Canada Airworthiness Directive CF-89-14 Rev 1. Compliance: 1. PW115, PW118, PW120, PW120A, PW121 engines; at next access to affected parts. 2. PW118A, PW123, PW124B, PW125B, PW126 engines; at next scheduled engine shop visit, but no later than 31 December 1991. Background: This Directive has been amended to reflect a revision to the Requirement Document. The revision alleviates the compliance requirements for engines with PW115/PW120 series turbine components, and includes reference to alternative service bulletins acceptable to Transport Canada as meeting the intent of Airworthiness Directive CF- 89-14.