COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Teledyne Continental Motors Piston Engines AD/CON/68 Incorrect Oil Pick-Up Tube 1/94 Applicability: TCM O-470, IO-470, IO-520, TSIO-520 and IO-550 engines, as detailed by serial number in Teledyne Continental Motors Service Bulletin M91-10 Rev.1. Note: This Directive is only applicable to engines rebuilt or overhauled by the manufacturer Teledyne Continental Motors, Mobile Alabama USA, prior to November 1991. Requirement: Inspect the oil sump for evidence of an incorrect oil pick-up tube in accordance with the requirements of TCM Service Bulletin M91-10 Rev. 1. If an incorrect oil tube is installed, the oil tube and sump shall be replaced before further flight. Note: FAA Airworthiness Directive 93-08-17 refers. Compliance: Effective 6 January 1994: 1. Within 25 hours time in service. 2. Prior to installation in an aircraft. Background: This Directive requires an inspection of the oil sump for evidence of an incorrect oil pick-up tube being fitted during assembly. The requirement follows advice of a number of engines released by the manufacturer with incorrect oil pick-up tubes fitted.