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The pilot intended to land the helicopter near a water tank so that he could free sheep bogged in the muddy ground. When the aircraft was at about 80 feet agl on descent, the pilot applied power and raised the collective to reduce the rate of descent. He heard a bang, followed by a noise he described as clutch growl and the helicopter began to vibrate severely. The collective was lowered momentarily and power was reapplied, however, the clutch growl and vibration continued. The pilot lowered the collective but the helicopter struck the ground firmly at a low forward speed and the main rotor severed the tail boom. Subsequent investigation revealed that the clutch had suffered an overload failure, however the reason for the failure was not determined. The associated loss of power occurred at a height and speed combination which precluded the pilot from establishing an autorotative descent.

Download Final Report
[ Download PDF: 22KB]
 
 
 
 
General details
Date: 03 October 1985 Investigation status: Completed 
Time: 1030 Investigation type: Occurrence Investigation 
Location:Reola Station, 83 km WSW of Wanaaring  
State: New South Wales  
Release date: 31 July 1986 Occurrence category: Accident 
Report status: Final Highest injury level: None 
 
Aircraft details
Aircraft manufacturer: Robinson Helicopter Co 
Aircraft model: R22 
Aircraft registration: VH-UXR 
Type of operation: Aerial Work 
Sector: Helicopter 
Damage to aircraft: Substantial 
Departure point:Reola Station NSW
Departure time:1030
Destination:Reola Station NSW
 
 
 
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