Aviation safety investigations & reports

Loss of separation assurance involving an Embraer EMB-135, VH-JTG and an Airbus A321, VH-VWX, overhead Taroom Airport, Qld on 21 October 2014

Investigation number:
Status: Discontinued


Section 21 (2) of the Transport Safety Investigation Act 2003 (TSI Act) empowers the Australian Transport Safety Bureau (ATSB) to discontinue an investigation into a transport safety matter 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.

On 24 October 2014, the ATSB commenced an investigation into a loss of separation assurance involving an Embraer EMB-135, registered VH-JTG, and an Airbus A321, registered VH-VWX, overhead Taroom Aerodrome, Queensland on 21 October 2014.

Examination of the information collected during the investigation indicated that the aircraft were assigned the same flight level on crossing tracks resulting in a loss of separation assurance. VH-JTG passed in front of VH-VWX and separation reduced to 6.6 NM (12 km). The lateral separation standard at the time was 5 NM (9 km) and there was no Short Term Conflict Alert (STCA) or other alert issued, including by the aircraft’s systems.

The ATSB did not identify any organisational or systemic issues that contributed to the incident and assessed that no safety issues would be identified through further investigation. On that basis, the ATSB has decided to discontinue its investigation.

General details
Date: 21 October 2014   Investigation status: Discontinued  
Time: 06:28 EST   Investigation level: Short - click for an explanation of investigation levels  
Location   (show map): overhead Taroom Airport    
State: Queensland   Occurrence type: Loss of separation assurance  
Release date: 03 December 2014   Occurrence category: Incident  
Report status: Discontinued   Highest injury level: None  
Anticipated completion: 1st Quarter 2015    

Aircraft 1 details

Aircraft 1 details
Aircraft manufacturer Embraer-Empresa Brasileira De Aeronautica  
Aircraft model EMB-135LR  
Aircraft registration VH-JTG  
Serial number 145687  
Type of operation Charter  
Sector Jet  
Damage to aircraft Nil  
Departure point Brisbane, Qld  
Destination Osborne, Qld  

Aircraft 2 details

Aircraft 2 details
Aircraft manufacturer Airbus  
Aircraft model A321-231  
Aircraft registration VH-VWX  
Serial number 3899  
Operator Jetstar Airways  
Type of operation Air Transport High Capacity  
Sector Jet  
Damage to aircraft Nil  
Departure point Sydney, NSW  
Destination Cairns, QLD  
Last update 14 November 2018