Aviation safety investigations & reports

Aircraft proximity event - SAAB 340B, VH-ZRC and a Hawker Beechcraft B200, VH-MWH, 87 km east of Broken Hill Airport, NSW, 26 August 2011

Investigation number:
Status: Completed
Investigation completed


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On 26 August 2011, a Hawker Beechcraft Corporation B200 aircraft, registered VH-MWH (MWH), departed Ivanhoe for Broken Hill, New South Wales. While maintaining flight level 140, the pilot of MWH received a traffic alert and collision avoidance system (TCAS) traffic advisory (TA) on a Regional Express S.A.A.B. Aircraft Corporation 340B aircraft, registered VH-ZRC (ZRC), which had departed Broken Hill for Sydney and was on climb to flight level 170.

At about the same time, while climbing through flight level 130, the crew of ZRC received a TCAS TA, shortly followed by a resolution advisory (RA). As the First Officer (FO) believed they were above MWH, he immediately commenced a climb. Shortly after, the Captain noted that the FO's response was contrary to the RA command to descend and advised the FO, who immediately commenced a descent.

A review of the Airservices Australia radar data indicated that, with both aircraft at flight level 142, lateral separation reduced to 2.2 NM.

This incident highlighted the benefit of TCAS in assisting pilots with traffic awareness and the importance of responding appropriately to a TCAS RA.

Download Final Report
[Download  PDF: 3.63MB]
Alternate: [Download  DOC: 9.81MB]
General details
Date: 26 August 2011   Investigation status: Completed  
Time: 0721 EST   Investigation level: Short - click for an explanation of investigation levels  
Location   (show map): 87 km east of Broken Hill Airport    
State: New South Wales   Occurrence type: Separation issue  
Release date: 24 May 2012   Occurrence category: Incident  
Report status: Final   Highest injury level: None  

Aircraft 1 details

Aircraft 1 details
Aircraft manufacturer S.A.A.B. Aircraft Co  
Aircraft model 340  
Aircraft registration VH-ZRC  
Serial number 340B-390  
Type of operation Air Transport Low Capacity  
Damage to aircraft Nil  
Departure point Broken Hill, NSW  
Destination Sydney, NSW  

Aircraft 2 details

Aircraft 2 details
Aircraft manufacturer Hawker Beechcraft Corporation  
Aircraft model 200  
Aircraft registration VH-MWH  
Serial number BB-2003  
Type of operation Medical Transport  
Damage to aircraft Nil  
Departure point Ivanhoe, NSW  
Destination Broken Hill, NSW  
Last update 14 November 2018