Loss of separation involving a Beech Aircraft Corp 76, VH-MFS and Cessna Aircraft Company 210L, VH-BYK, Darwin, NT on 30 June 1993

VH-MFS was inbound to Darwin and cleared to maintain 1,500 feet by Darwin Approach Control, then subsequently instructed to call Darwin Tower. When the pilot contacted the tower he was advised of traffic, VH-BYK, a Cessna 210 on downwind for runway 36. This aircraft was sighted about two kilometres in front and 100-200 feet below. VH-MFS passed directly over VH-BYK. The pilot of VH-MFS was advised by the RAAF controller that an error of judgement on their part had resulted in the confliction. Safety Action: Deficiencies identified during this and other investigations involving procedures by Darwin RAAF controllers are the subject of further analysis in conjunction with the Directorate of Flying Safety - Air Force.