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 125/48 Radome Lightning Protection - Modification 12/77 Applicability: As detailed in the requirement document. Document: Hawker Siddeley SB No. 53-50. Compliance: Before 1 March 1978.