COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 90 and 65-90 (King Air) Series Aeroplanes AD/BEECH 90/90 Leading Edge Fuel Tanks 12/93 Applicability: All B90, C90 and C90A aircraft S/N LJ-489 thru to LJ-1318 inclusive. Requirement: Action in accordance with Beechcraft Mandatory Service Bulletin No 2475. Note: FAA AD 93-17-01 amdt 39-8671 refers. Compliance: Unless previously carried out within 150 hours' time in service from 11 November 1993. Background: Misalignment of the fuel line resulting in cracking of the fuel cell nipples have been reported. Failure to detect and repair a damaged fuel cell nipple could result in fuel leaks and possible aircraft fire.