Aviation safety investigations & reports

Windshear event involving a Eurocopter EC120B, VH-BGB, near Port Hedland Airport, WA on 21 October 2014

Investigation number:
Status: Completed
Investigation completed


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On 21 October 2014, the pilot of a Eurocopter EC120B helicopter, registered VH-BGB, conducted a charter flight from a ship about 24 nautical miles north-north-west of Port Hedland to transfer two marine pilots to Port Hedland Airport, Western Australia. The flight was conducted under night visual flight rules.

At about 2240 Australian Western Standard Time, the helicopter lifted off and the pilot commenced the climb and transitioned to a forward airspeed of about 15 knots. As the helicopter passed over the bow of the ship, it encountered windshear. Approaching about 350 feet above sea level, the pilot observed the airspeed indicating about 5 knots. He reported that his focus had momentarily been on the radar altimeter and he had not detected the airspeed decaying. He immediately applied forward cyclic to increase the airspeed, then continued the climb to 1,500 feet, and proceeded to Port Hedland without further incident.

The pilot reported that in a normal climb, by about 400 feet he would expect the airspeed to be approaching 40 knots. He believed that his delay in recognising the decreasing airspeed was due to feeling unwell. He had some symptoms of a cold prior to the flight, had been on duty for about 22 hours prior to the incident, and had slept for about 2 hours during that time.

The helicopter operator issued a Safety Notice to all company pilots reminding them of the importance of managing fatigue and fitness to fly in accordance with their Fatigue Management policy.


Aviation Short Investigations Bulletin - Issue 38

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General details
Date: 21 October 2014   Investigation status: Completed  
Time: 2240 WST   Investigation level: Short - click for an explanation of investigation levels  
Location   (show map): near Port Hedland Airport    
State: Western Australia   Occurrence type: Turbulence/windshear/microburst  
Release date: 27 January 2015   Occurrence category: Incident  
Report status: Final   Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer Eurocopter  
Aircraft model EC120B  
Aircraft registration VH-BGB  
Serial number 1347  
Type of operation Charter  
Sector Helicopter  
Damage to aircraft Nil  
Departure point FPMC.B.Luck (ship) near Port Hedland, WA  
Destination Port Hedland, WA  
Last update 14 November 2018