COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES British Aerospace BAe 125 Series Aeroplanes AD/HS 125/137 Oxygen System Inspection 4/93 DM Applicability: All BAe 125 Series 1000 aircraft identified in Corporate Jets Limited Service Bulletin S.B. 35-36 dated 7 January 1993. Requirement: Action in accordance with the Accomplishment Instructions of Corporate Jets Limited Service Bulletin S.B. 35-36 dated 7 January 1993. Note: This Service Bulletin has been classified as Mandatory by the CAA(UK), AD 022-01-93 dated 25 January 1993 refers. Compliance: Prior to 5 March 1993. Background: This Directive has been issued following reports of chafing between the nose wheel steering control chain and oxygen pipe assembly 25-9SF61-125A. Compliance with this Directive will prevent damage being caused to the oxygen pipe by nose wheel steering control chain operation.