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The aircraft was enroute from Alice Springs to Cairns and was displayed to the Daintree sector controller in the Brisbane air traffic control centre, as a green jurisdiction track and label . Without notice, the display changed to an uncoupled black track without label data, resulting in the sector controller losing situational awareness. Investigation revealed that the Cairns tower coordinator controller had cancelled the aircraft's flight data record (FDR) in the Australian advanced air traffic control system (TAAATS). The coordinator had assumed that an aircraft on the ground at Cairns was the aircraft displayed as airborne and consequently felt it was unnecessary to check further prior to deleting the record. Local instructions precluded the cancellation of flight data records not under the coordinator's jurisdiction without prior consultation/coordination with other air traffic control units. The possibility of this occurring had been recognised by management and the instructions were issued in an endeavour to prevent inadvertent deletion of a flight data record. TAAATS displays a warning message requesting confirmation of the requested action when a controller deletes an FDR for an aircraft. This message does not warn controllers that they do not have jurisdiction of the aircraft. Airservices Australia have proposed that the warning message for non-jurisdiction FDRs should be amended to alert controllers to the fact that coordination is required prior to deleting the FDR. SAFETY ACTION Local safety action A request to change the warning message has been submitted by Airservices Australia Northern District (This is one of many TAAATS software modification requests that have been submitted). The modification is unlikely to be actioned in the short term due to the need to action higher priority tasks. Bureau of Air Safety Investigation safety action BASI will monitor Airservices' actions and, in particular, any system modifications which are made to prevent further similar occurrences.

 

Local safety action

Airservices Australia advised that a request to change the warning message has been submitted by the Northern District. (This is one of many TAAATS software modification requests that have been submitted.) However, the modification is unlikely to be actioned in the short term due to the need to action higher priority tasks.

Bureau of Air Safety Investigation safety action

BASI will monitor Airservices' actions and, in particular, any system modifications made to prevent further similar occurrences.

 
General details
Date: 14 November 1998 Investigation status: Completed 
Time: 1639 hours EST Investigation type: Occurrence Investigation 
Location   (show map):80 km SW Cairns Aero. Occurrence type:ANSP info/procedural error 
State: Queensland Occurrence class: Airspace 
Release date: 29 July 1999 Occurrence category: Incident 
Report status: Final Highest injury level: None 
 
Aircraft details
Aircraft manufacturer: British Aerospace PLC 
Aircraft model: BAe 146 
Aircraft registration: VH-JJX 
Serial number: E2127 
Type of operation: Air Transport High Capacity 
Damage to aircraft: Nil 
Departure point:Alice Springs, NT
Destination:Cairns, QLD
 
 
 
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Last update 13 May 2014