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The aircraft had previously had to be flown with the control stick displaced to the right of centre in order to maintain a wings level attitude. The aircraft owner advised a visiting ultralight pilot of the problem, who offered to attempt rectification. After conducting a flight to experience the problem first hand, the pilot adjusted the right wing warping wire and conducted another test flight. The adjustment had improved the trim problem but still not completely provided a fix. The pilot then readjusted the right wing warping wire to its original condition and added a D-shackle to the left wing warping wire to increase its length. Another test flight was carried out and it was found that the aircraft could only be maintained in level flight when full right rudder and full right control stick were applied. The aircraft was struck by a wind gust and the left wing dropped, as no further control was available to correct this situation, the pilot pulled a wing warping wire. Unfortunately he pulled the right wire instead of the left wire and was unable to correct his error before the aircraft struck the ground. A subsequent inspection of the wreckage found that the right wing warping wire was 19 millimetres longer than the left. Also, all the dimensions of the right wing were slightly larger than that of the left wing, resulting in the right wing area being about 80 square centimetres greater.

Download Final Report
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General details
Date: 30 September 1987 Investigation status: Completed 
Time: 1000  
Location:Deeral (10 km N Babinda) Investigation type: Occurrence Investigation 
State: Queensland Occurrence type: Loss of control 
Release date: 17 December 1987 Occurrence class: Operational 
Report status: Final Occurrence category: Accident 
 Highest injury level: Serious 
Aircraft details
Aircraft manufacturer: Skycraft Pty Ltd 
Aircraft model: Scout Mark III 
Type of operation: Sports Aviation 
Damage to aircraft: Substantial 
Departure point:Property Strip near Deeral QLD
Departure time:0957
Destination:Property Strip near Deeral QLD
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Last update 09 May 2016