Aviation safety investigations & reports

Separation issue involving AgustaWestland AW139, VH-YXH and Piper PA-44-180, VH-HMQ near Mangalore Airport, Victoria on 6 June 2021

Investigation number:
Status: Active
Investigation in progress


The Australian Transport Safety Bureau (ATSB) is investigating a separation issue involving two aircraft, a Moorabbin Aviation Services PA-44-180 and a Babcock Mission Critical Services AW139 above Mangalore Airport, Victoria on 6 June 2021.

At 1556, the AW139 was flying southbound toward Mangalore at 3,100 feet above mean sea level. At the same time, the PA-44 was conducting a practice instrument approach to Mangalore. The PA-44 commenced a missed approach from below 3,000 feet in a northerly direction toward Mangalore and the pilot broadcast that the aircraft would climb to 3,900 feet. Shortly after the PA-44 began climbing, the pilot of the AW139 received a traffic collision and avoidance (TCAS) alert and manoeuvred the aircraft to increase separation between the two aircraft. Both flights continued without further incident.

The evidence collection phase of the investigation will include reviewing recorded communications, air traffic control surveillance data and weather information and interviews with the flight crews.

A final report will be released at the conclusion of the investigation. Should a critical safety issue be identified during the course of the investigation, the ATSB will immediately notify relevant parties so that appropriate safety action can be taken.

General details
Date: 06 June 2021   Investigation status: Active  
Time: 15:56 EST   Investigation level: Short - click for an explanation of investigation levels  
Location   (show map): overhead Mangalore Aerodrome   Investigation phase: Final report: Approval  
State: Victoria   Occurrence type: Loss of separation assurance  
  Occurrence category: Incident  
Report status: Pending   Highest injury level: None  
Anticipated completion: 2nd Quarter 2022    

Aircraft 1 details

Aircraft 1 details
Aircraft model AW139  
Aircraft registration VH-YXH  
Serial number 31607  
Operator Babcock Mission Critical Services  
Type of operation Medical Transport  
Sector Helicopter  
Damage to aircraft Nil  
Departure point Yielima, Victoria  
Destination Royal Melbourne Hospital, Victoria  

Aircraft 2 details

Aircraft 2 details
Aircraft manufacturer Piper Aircraft Corp  
Aircraft model PA-44-180  
Aircraft registration VH-HMQ  
Serial number 44-7995201  
Operator Moorabbin Aviation Services  
Type of operation Flying Training  
Sector Piston  
Damage to aircraft Nil  
Departure point Wagga, Wagga, NSW  
Destination Mangalore, Victoria  
Last update 20 May 2022