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The pilot stated that he allowed the engine temperature to stabilise for about two minutes at 2800 RPM after landing, then reduced power to about 2000 RPM for a further minute. At about the same time a severe bouncing started, the pilot disengaged the rotors and attempted to shut the engine down. The helicopter was affected by ground resonance and the pilot, who had already released his seat belt, was thrown to the floor of the helicopter.

Download Final Report
[ Download PDF: 22KB]
General details
Date: 29 September 1987 Investigation status: Completed 
Time: 645  
Location:Ivory Creek (5 km W Toogoolawah) Investigation type: Occurrence Investigation 
State: Queensland Occurrence type: Airframe - Other 
Release date: 06 February 1989 Occurrence class: Technical 
Report status: Final Occurrence category: Accident 
 Highest injury level: Minor 
Aircraft details
Aircraft manufacturer: Hughes Helicopters 
Aircraft model: 269 
Aircraft registration: VH-THR 
Serial number: 970635 
Type of operation: Aerial Work 
Sector: Helicopter 
Damage to aircraft: Substantial 
Departure point:Ivory Creek QLD
Departure time:N/A
Destination:Ivory Creek QLD
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