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After application of full throttle during the takeoff run, a severe vibration developed which rapidly stopped the engine from rotating. When the aircraft came to rest the pilot noted that one of the two propeller blades had cleanly separated from its hub. The hub failed as a result of fatigue cracking which extended around approximately half of its circumference. The cracking originated in the root of the blade retention thread and grew progressively over about 850 flights. The cracking was not visible during normal periodic inspections because the hub had been painted to help prevent corrosion.

Download Final Report
[ Download PDF: 22KB]
General details
Date: 02 August 1987 Investigation status: Completed 
Time: 1600  
Location:Streaky Bay Investigation type: Occurrence Investigation 
State: South Australia Occurrence type: Propeller/rotor malfunction 
Release date: 16 December 1987 Occurrence class: Technical 
Report status: Final Occurrence category: Accident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: Beagle Aircraft Ltd 
Aircraft model: A109 
Aircraft registration: VH-UEM 
Serial number: B 520 
Type of operation: Private 
Damage to aircraft: Substantial 
Departure point:Streaky Bay SA
Departure time:N/A
Destination:Yeelanna SA
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Last update 13 May 2014