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/CF700/15 Fan Guard Replacement 11/97 Applicability: General Electric CF700 series turbine engines. Requirement: Replace existing fan guards in accordance with General Electric Service Bulletin number (CF700) 72-154. Note: FAA AD 97-13-10 also refers. Compliance: No later than 9 October 1999. This airworthiness directive becomes effective on 9 October 1997. Background: This directive is prompted by reports of uncontained fan blade failures following engine overspeed events.