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/50 Powerplant - Revised Power Lever To Manual Fuel Valve 12/91 Applicability: All Jetstream 3100 and 3200 Aircraft construction numbers up to and including 928. Requirement: Action in accordance with the Technical requirements of British Aerospace Service Bulletin, CAA (UK) mandatory, 71-JM 7755. Requirement: Prior to 31 March 1992. Compliance: There have been occurrences of the power lever becoming detached from the manual fuel valve on the engine. The resulting inability to control the power of the affected engine required the aircrew to initiate emergency procedures.