COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Fokker F50 (F27 Mk 50) Series Aeroplanes AD/F50/38 Auto Flight Idle Stop Mechanism Modification 10/90 Applicability: Model F50 series with serial numbers 20103 through 20108, 20110 through 20159, 20161 through 20173 and 20176 through 20178. Requirement: Action in accordance with Fokker Service Bulletin F50-76-008 Revision 1. Note: RLD AD 90-043 refers. Compliance: Prior to 1 January 1991. Background: Reports have been received of incidents where the power levers could not be retarded below flight idle during landing. This Directive requires a modification of the mechanism adjustment of the auto flight idle stop located on the engine