Aviation safety investigations & reports

Forced/precautionary landing involving a Robinson Helicopter Co R44, VH-OCT, 8km SW Walkerville, VIC on 4 April 1998

Investigation number:
Status: Completed
Investigation completed


Download Final Report
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The pilot reported that the engine stopped in the cruise at about 600 ft. He entered autorotation and landed in low trees and scrub. The engine stopped because the crank shaft drive gear bolt failed due to hydrogen embrittlement. When the bolt failed drive to the accessories was lost. The manufacturer has verbally assured CASA that this was an isolated instance of a bolt failure.
Download Final Report
[Download  PDF: 14KB]
General details
Date: 04 April 1998   Investigation status: Completed  
Time: 13:45 EST    
State: Victoria   Occurrence type: Forced/precautionary landing  
Release date: 24 June 1998   Occurrence category: Accident  
Report status: Final    

Aircraft details

Aircraft details
Aircraft manufacturer Robinson Helicopter Co  
Aircraft model R44  
Aircraft registration VH-OCT  
Sector Helicopter  
Damage to aircraft Substantial  
Departure point Lilydale Vic.  
Destination Hobart Tas.