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 125/54 Fuselage Front Pressure Bulkhead - Inspection 10/80 Applicability: All HS/DH/BH 125 models up to and including Series 400. Document: British Aerospace 125 SB No. 53-52. Compliance: As per requirement document except that stated flights shall be pressurised flights. Background: Cracking in the corner bend radii of both control pressings on one aircraft was discovered on an overseas aeroplane after 6700 flights.