COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES General Electric Turbine Engines - CF700 Series AD/CF700/8 Fan Centre Vent System 9/85 Applicability: All CF700-2C, -2D and -2D-2. Document: General Electric SB (CF700) 79-8; or AD/GE-T/20. Compliance: Before installation in an aircraft following next hot end inspection or engine reconditioning completed after 28 January 1972, whichever occurs first.