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 125/143 Amdt 1 Addition of Vents and Pressure Relief Device 11/94 Applicability: Model BAe 125 Series 1000A and 1000B and Hawker 1000. Requirement: 1. Action in accordance with Hawker Raytheon Corporate Jets Mandatory Service Bulletin 53-76-3627A. 2. Action in accordance with Hawker Raytheon Corporate Jets Mandatory Service Bulletin 53-81-3661B. 3. Action in accordance with Hawker Raytheon Corporate Jets Mandatory Service Bulletin 21-151-25A683C. Compliance: Prior to 31 March 1995. Background: The manufacturer and the UK CAA require certain actions to be taken to ensure the structural integrity of the aircraft, in the event of an explosive decompression. Amendment 1 is issued in response to an additional modification requirement which has taken the manufacturer time to develop. As this modification requires minimal removal of furnishings for access, the UK CAA has imposed the same compliance time.