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VH-TJM departed Ayers Rock for Alice Springs and VH-LTC departed Alice Springs for Ayers Rock. To ensure separation the Alice Springs air traffic controller assigned a cruising altitude of 5000 feet to VH-LTC and cleared VH-TJM to descend to 7000 ft. He estimated that the aircraft would pass about 40km from Alice Springs and VH-LTC was instructed to report sighting and passing VH-TJM. Subsequently, at 48km from Alice Springs, VH-TJM was cleared for a visual descent. The air traffic control workload was heavy at the time, but shortly afterwards the controller realised he had not applied a separation standard before allowing VH-TJM to commence the visual descent. He contacted both aircraft for position reports which revealed that they had passed safely and were about 20km apart. Fortuitously there was no confliction.
General details
Date: 28 December 1993 Investigation status: Completed 
Time: 13:02 CST  
 Investigation type: Occurrence Investigation 
Release date: 19 June 1994 Occurrence class: Airspace 
Report status: Final Occurrence category: Incident 
Aircraft 1 details
Aircraft manufacturer: Piper Aircraft Corp 
Aircraft model: PA-32R-301 
Aircraft registration: VH-LTC 
Sector: Piston 
Damage to aircraft: Nil 
Departure point:Alice Springs NT
Destination:Ayers Rock NT
Aircraft 2 details
Aircraft manufacturer: The Boeing Company 
Aircraft model: 737-476 
Aircraft registration: VH-TJM 
Sector: Jet 
Damage to aircraft: Nil 
Departure point:Ayers Rock NT
Destination:Alice Springs NT
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Last update 24 July 2015