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/30 Electrical Power - Static Inverters 1/89 Applicability: Jetstream 3100 series aircraft constructor numbers 601-695 inclusive fitted with Leland model ASH 674-3 and 674-33 static inverters, but excluding constructor numbers 647, 656, 659 and 667. Requirement: Action in accordance with BAe Jetstream ASB 24-A-JA880640. Compliance: Inverters that have exceeded 5000 hrs TIS but less than 10,000 hrs TIS are to be replaced before 26 May 1989; Inverters that have exceeded 10,000 hrs TIS are to be replaced before 26 February 1989. Note: Refer also to Requirement document para D for amplification of compliance details. Background: Operators have reported in-flight incidents of inverter failure due to overheat and smoking of components.