COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Short SC7 (Skyvan) Series Aeroplanes AD/SC7/16 Wing Lower Skin/Wing Lift Strut Fairing - Inspection 2/80 Applicability: All Skyvan series 3, 3A and 3M. Document: Shorts SB No. 57-63. Compliance: Within 100 hours time in service after 30 April 1980 and thereafter at intervals not exceeding 100 hours time in service until modified in accordance with SB No. 57-64. Background: Damage to the wing lower skin can occur over a period of time due to incorrect location of the wing lift strut fairing.