COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES AlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series AD/TPE 331/48 Fuel Control Unit Drive Shaft Spline Wear 5/99 Requirement: CANCELLED. Note: Operators can elect to remove or retain, reference in the Emergency Procedures Section of the approved flight manual (AFM) to a procedure to be carried out in the event of an uncommanded engine torque and turbine temperature increase. FAA Airworthiness Directive 94-26-07 refers. Background: This directive has been cancelled in response to advice that the drive shafts of concern have been removed from service and the inspection requirements of this directive are now reflected in the applicable engine maintenance manual inspection schedule.