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During a practice circuit, the pilot noticed an intermittent vibration through the aircraft. He elected to discontinue the exercise and carried out a normal landing. As the mixture control was placed in the idle/cut-off position, one of the main rotor blades struck the tail boom. The vibration noticed by the pilot probably resulted from spark plug fouling. Strong, gusty wind conditions prevalent at the time of the accident, were ideal for exaggerated main rotor flapping known as "blade sailing".

Download Final Report
[ Download PDF: 22KB]
General details
Date: 29 October 1987 Investigation status: Completed 
Time: 1220  
Location:Jandakot Investigation type: Occurrence Investigation 
State: Western Australia  
Release date: 26 February 1988  
Report status: Final Occurrence category: Accident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: Robinson Helicopter Co 
Aircraft model: R22 
Aircraft registration: VH-JVC 
Serial number: 335 
Type of operation: Flying Training 
Sector: Helicopter 
Damage to aircraft: Substantial 
Departure point:Jandakot WA
Departure time:1215
Destination:Jandakot WA
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