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The pilot reported that just after lift off the engine seemed to lose power. She manoeuvred the helicopter to a suitable landing area, but during the landing the main rotor blades struck a sapling. The helicopter was then repositioned to another landing site where the engine was shutdown and the damage to the main rotors noticed. An inspection of the engine revealed that the number two and four exhaust valves had been sticking and that the valve guides were out of tolerance. It is probable that the loss of engine power was a result of the exhaust valves sticking.

Download Final Report
[ Download PDF: 22KB]
General details
Date: 16 April 1985 Investigation status: Completed 
Time: 1530  
Location:Mount Hope (250 km West of Mackay) Investigation type: Occurrence Investigation 
State: Queensland  
Release date: 16 December 1985  
Report status: Final Occurrence category: Accident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: Hughes Helicopters 
Aircraft model: 269 
Aircraft registration: VH-PHK 
Type of operation: Aerial Work 
Sector: Helicopter 
Damage to aircraft: Substantial 
Departure point:Mount Hope QLD
Departure time:1530
Destination:Scartwater Station QLD
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