COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Rolls Royce Turbine Engines - Dart Series AD/DART/26 Low Torque Switch 6/97 Applicability: All Rolls Royce Dart series engines. Requirement: To ensure unapproved low torque switches are removed from service, inspect installed and spare low torque switches in accordance with Rolls Royce Service Bulletin Da61-13. Note: CAA (UK) AD 002-12-96 also refers. Compliance: Unless previously accomplished, no later than 30/6/97. This Airworthiness Directive becomes effective on 22 May 1997. Background: The manufacturer has advised that unapproved low torque switches have been found in service. These switches may give rise to difficulties during activation of the autofeathering system.