COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Bell Helicopter Textron 212 Series Helicopters AD/BELL 212/58 Fuel Line Replacement 9/97 Applicability: All Bell Helicopter Textron 212 Series Helicopters in the following S/N range; 30501 thru 30999, 31101 thru 31311, 32101 thru 32142 and, 35001 thru 35080. Requirement: Replace engine fuel lines hoses as detailed in Bell Technical Bulletin 212-96-157 dated 22 July 1996. Note: Canadian AD CF-97-04 refers. Compliance: Unless previously carried out, no later than 30 June 1998. This airworthiness directive becomes effective on 14 August 1997. Background: The Transportation Safety Board of Canada has determined there has been at least two accidents where failure of a aluminium elbow attached to tee-fitting P/N 110- 089-12C either broke or was suspected to have broken as a result of the helicopter rolling onto its side. In one accident, fire which originated in the area of the failed fitting destroyed the helicopter and resulted in three fatalities.