COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Short SD3-60 Series Aeroplanes AD/SD3-60/50 Emergency Brake Accumulator Mounting Structure 1/99 Applicability: All SD360 aircraft. Requirement: Action in accordance with Shorts Mandatory Service Bulletin SD360-29-06. Compliance: Unless already accomplished, before 28 April 1999. This Airworthiness Directive becomes effective on 28 January 1999. Background: The manufacturer received a report of cracking of the emergency brake accumulator mounting structure. This Directive requires an inspection to detect cracking, and, if necessary, replacement of a support bracket angle.