COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Mitsubishi MU-2 Series Aeroplanes AD/MU-2/54 Tip Tank Wiring Conduit 2/94 Applicability: MU-2B-10, -15, -20, -25 and -26 S/N 008 through 347 (except S/N 313 and 321) and MU/2B/-30, -35 and -36 S/N 501 through 696 (except S/N 652 and 661). Requirement: Unless previously carried out action in accordance with Mitsubishi MU-2 Service Bulletin No 221. Note: JCAB TCD-3901-93 refers. Compliance: Within 100 hours time in service from 28 February 1994. Background: The manufacturer has advised that due to corrosion in the conduit which carries the navigation light and fuel low level switch wiring which could allow fuel to leak into the wiring conduit.