COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES AlliedSignal (Lycoming) Turbine Engines - LTS 101 Series AD/LTS/7 Amdt 2 Power Turbine Rotor 3/91 Applicability: All LTS 101 series engines fitted with Power Turbine Rotors part number 4-141-070- XX. Requirement: Action in accordance with Textron Lycoming SB No LT 101-72-00-0093 Rev. 5 Note: FAA AD 87-11-09 refers. Compliance: Unless previously accomplished; within 50 hours time in service from 21 March 1991, and thereafter at intervals not to exceed 50 hours or 300 cycles, whichever occurs first. Background: This Directive has been amended to reflect the manufacturers latest revision to the Requirement Document detailed in FAA AD 87-11-09. This amendment also reflects the release of an individually bladed power turbine rotor. LTS101 series engines fitted with individually bladed power turbine rotors are not affected by this Directive.