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The identification and planned level (FL290) of the aircraft was coordinated with the Melbourne Sector 12 controller. The aircraft was observed on radar to maintain FL250. The amended level was not coordinated with sector 12. There was no infringement of separation standards. An investigation by Airservices Australia found: 1. that the sector did not have specific procedures to ensure that controllers on adjacent sectors were notified when sector 12 opened/closed, 2. the Hume sector controller did not coordinate the change of level with the sector 12 controller, 3. a console display notifying active sectors had not been updated, and 4. that the display did not provide an indication of combined sectors. Consequently, there had been some confusion in relation to the required coordination between sectors. The investigation is continuing.
Download Final Report
[ Download PDF: 13KB]
General details
Date: 11 July 1999 Investigation status: Completed 
Time: 10:25 EST  
 Investigation type: Occurrence Investigation 
 Occurrence type: Breakdown of co-ordination 
Release date: 18 August 1999 Occurrence class: Airspace 
Report status: Final Occurrence category: Incident 
Aircraft details
Aircraft manufacturer: Cessna Aircraft Company 
Aircraft model: 500 
Aircraft registration: VH-SOU 
Sector: Jet 
Damage to aircraft: Nil 
Departure point:Cooma NSW
Destination:Bankstown NSW
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Last update 28 October 2014