COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES British Aerospace BAe 3100 (Jetstream) Series Aeroplanes AD/JETSTREAM/31 Inverter Circuit Protection 1/89 Applicability: All Jetstream 3100 series aircraft constructors numbers 696 to 794, 796 to 799, 801 to 804, 806 to 809, 811 to 813, 815 to 817, and 820. Requirement: Action in accordance with BAe ASB 24-A-JA7672A. Compliance: Prior to 26 April 1989. Background: BAe have advised that the 26 Vac output cable of AII inverters installed by modification JM 7518 are not protected by a thermal fuse or circuit breaker. ASB 24- A-JA 7672A installs circuit breaker protection for the 26 Vac output cable.