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 125/70 EFIS Power Supply 8/85 Applicability: All BAe-125 series aeroplanes with the following S/Nos: Series 700B - 257208 to 257210, 257214 and 257215 Series 800A and B - 258001 to 258020, 258022 to 258024 and 258026. Requirement: Modify the EFIS power supply according to the requirements detailed in British Aerospace 125 S.B. 24-248-(3024). Note: United Kingdom CAA AD No. 004-04-85 Refers. Compliance: Prior to 31 October 1985. Background: The aircraft manufacturer advises of an overheat of the heat sink diode assembly on a completed aircraft.