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The helicopter was engaged in cattle mustering operations. Whilst in level flight at an altitude of 200 feet, the pilot heard a loud noise and felt severe vibration from the engine, which subsequently failed. Following auto-rotation to ground impact, the aircraft rolled onto its side. The semi-conscious pilot was assisted from the wreckage by the passenger who had evacuated the cockpit unassisted. Strip examination revealed that the engine had failed due to broken conrod bolts and a separated conrod big-end cap from the No. 4 cylinder conrod assembly. This had resulted in internal mechanical damage sufficient to stop the engine.

Download Final Report
[ Download PDF: 22KB]
General details
Date: 12 July 1990 Investigation status: Completed 
Time: 1100  
Location:15km NW of Yuendumu Investigation type: Occurrence Investigation 
State: Northern Territory  
Release date: 11 December 1990  
Report status: Final Occurrence category: Accident 
 Highest injury level: Serious 
Aircraft details
Aircraft manufacturer: Hughes Helicopters 
Aircraft model: 269 
Aircraft registration: VH-HOR 
Serial number: 430203 
Type of operation: Aerial Work 
Sector: Helicopter 
Damage to aircraft: Substantial 
Departure point:Yuendumu NT
Departure time:0900
Destination:Yuendumu NT
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