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While flying downwind at 30 knots about 50 feet above the ground, the pilot attempted to increase power to accelerate the aircraft. There was no response from the engine, and engine and rotor RPM fell as he applied collective pitch. He attempted to slow the aircraft to land but the heel of the left skid hit the ground and the helicopter rolled on to its side. Examination of the helicopter revealed that a very close tolerance fitting in the linkage between the throttle valve and the mixture control valve caused severe binding. This prevented normal throttle movement.

Download Final Report
[ Download PDF: 22KB]
 
 
 
 
General details
Date: 26 September 1988 Investigation status: Completed 
Time: 1030 Investigation type: Occurrence Investigation 
Location:Lake Nash NT (150 km WSW Mt Isa QLD)  
State: Northern Territory  
Release date: 06 February 1989 Occurrence category: Accident 
Report status: Final Highest injury level: None 
 
Aircraft details
Aircraft manufacturer: Hughes Helicopters 
Aircraft model: 269 
Aircraft registration: VH-HEA 
Serial number: 670612 
Type of operation: Aerial Work 
Sector: Helicopter 
Damage to aircraft: Substantial 
Departure point:Lake Nash NT
Departure time:0930
Destination:Lake Nash NT
 
 
 
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