Aviation safety investigations & reports

Breakdown of co-ordination involving a Cessna Aircraft Company 500, VH-SOU, 56km S Canberra, VOR, ACT on 11 July 1999

Investigation number:
Status: Completed
Investigation completed


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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    
State: Australian Capital Territory   Occurrence type: Breakdown of co-ordination  
Release date: 18 August 1999   Occurrence category: Incident  
Report status: Final    

Aircraft details

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