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Section 21 (2) of the Transport Safety Investigation Act 2003 (TSI Act) empowers the ATSB to discontinue an investigation at any time. Section 21 (3) of the TSI Act requires the ATSB to publish a statement setting out the reasons for discontinuing an investigation.

The ATSB had commenced an investigation into the triggering of GPWS alerts in a Boeing Company 737 during its approach to land at Darwin Airport, NT on 9 November 2009. Information obtained from the aircraft operator and the aircraft manufacturer indicated that the alerts signalled a minor problem with flap settings that the crew rectified without difficulty. The ATSB has assessed that the occurrence was unlikely to have any significant implications for transport safety and has elected to discontinue the investigation.

The data collected in the course of the investigation may be used by the ATSB for future statistical analysis and safety research purposes.


General details
Date: 09 November 2009 Investigation status: Discontinued 
Time: 0100 CST  
Location   (show map):Darwin Aerodrome Investigation type: Occurrence Investigation 
State: Northern Territory Occurrence type: E/GPWS warning 
Release date: 12 February 2010 Occurrence class: Operational 
Report status: Discontinued Occurrence category: Incident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: The Boeing Company 
Aircraft model: 737 
Aircraft registration: VH-VON 
Serial number: 33795 
Type of operation: Air Transport High Capacity 
Damage to aircraft: Nil 
Departure point:Brisbane, Qld
Destination:Darwin, NT
Crew details
RoleClass of licenceHours on typeHours total
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Last update 14 November 2018