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The pilot had been spreading Graslan, a herbicide, about five kilometres from an agricultural airstrip. The aircraft was being flown back to the strip at about 300 feet above ground level when suddenly, the engine developed a severe vibration. The pilot diagnosed a propeller blade failure and shut the engine down before it shook itself out of its mounts. The pilot chose the clearest area available for the forced landing, a sloping paddock covered in windrows consisting of recentlly bulldozed trees. The aircraft encountered one such heap of timber during its 60 metre ground roll. Post flight inspection found a 21 centimetre tip missing off one of the two propeller blades. Specialist metallurgical examination of the fracture surface indicated that the loss of the propeller tip was due to metal fatigue. The fatigue failure was initiated from an improperly blended mark caused by previous foreign object damage.

Download Final Report
[ Download PDF: 22KB]
General details
Date: 21 June 1990 Investigation status: Completed 
Time: 1210  
Location:Nandowrie, 100 km South-West of Emerald Investigation type: Occurrence Investigation 
State: Queensland Occurrence type: Propeller/rotor malfunction 
Release date: 28 August 1990 Occurrence class: Technical 
Report status: Final Occurrence category: Accident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: Snow Aeronautical 
Aircraft model: S2 
Aircraft registration: VH-SCY 
Serial number: 600-1383D 
Type of operation: Aerial Work 
Damage to aircraft: Substantial 
Departure point:Nandowrie QLD
Departure time:1140
Destination:Nandowrie QLD
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