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 748/10 Door Lock Warning Electrical System Integrity Check 1/95 Applicability: All HS 748 aircraft. Requirement: Carry out electrical indication system integrity check in accordance with paragraph 2.C.(2) of British Aerospace Aircraft Group, Manchester Division HS 748 Alert Service Bulletin 52/90 Revision 1 dated 17 December 1985. Note: CAA(UK) AD 008-07-81 refers. Compliance: At each `A' check after 5 January 1995. Background: This Directive is introduced to ensure the integrity of the electrical door lock indication system.