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/49 Engine Control - Engine Stop Circuitry 12/91 T Applicability: All Jetstream 3100 aircraft. Jetstream series 3200 aircraft with constructors numbers in the range 790 to 946 inclusive. Requirement: 1. Carry out a post flight test of the central annunciator panel in accordance with Part 1 of Jetstream SB 80-A-JA 911045. 2. Remove diodes from the engine stop circuitry in accordance with Part 2 of Jetstream SB 80-A-JA 911045. Compliance: Requirement 1. On completion of the last flight of the day, and before engine shutdown, commencing 1 November 1991. Requirement 2. Within 100 hours time in service after 31 October 1991, or prior to 10 November 1991, whichever is the sooner. Background: A diode failure in the central annunciator panel test button circuit can cause uncommanded engine shutdown when the test button is pressed.