COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Short SD3-30 Series Aeroplanes AD/SD3-30/19 Oxygen Bottle Protection 6/86 Applicability: All model Serial Nos. SH3100, SH3101, SH3103, SH3104, SH3106, SH3107, SH3109 to SH3113. Requirement: Action in accordance with Shorts SB SD 330-25-47. Compliance: Prior to 31 December 1986. Background: To prevent grease from control cables entering the area of the oxygen bottles.