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-2/15 Main Landing Gear Door Mechanism Support - Inspection Applicability: All model MU-2B-30/-35 with S/Nos. 501 to 585. Document: Mitsubishi SB No. 172. 1/76 Compliance: Within 100 hours time in service after 27 February 1976 and there- after at intervals not exceeding 100 hours time in service until modified in accordance with SB No. 172.