COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES British Aerospace (Hawker Siddeley) HS 748 Series Aeroplanes AD/HS 748/14 Nose Landing Gear Jack Support Bracket Attachment Studs Applicability: All HS748 aircraft post Modification 1472 and pre Modification 7513. 5/95 Requirement: Replace all Nose Landing Gear Jack Support Bracket Bearing Cap Attachment Studs P/N 2cD13248 in accordance with British Aerospace Alert Service Bulletin (ASB) A53/53 Revision 1. Note: CAA (UK) AD 013-11-86 refers. Compliance: Replace before 7 000 landings. Note: Incorporation of Modification 7513 cancels the requirement of this AD by introducing bolts with an extended fatigue life. Background: Service experience has shown that a safe life policy is required to ensure the continued integrity of the nose landing gear support structure. Nose landing gear malfunctions have been reported because of this problem.