Aviation safety investigations & reports

Loss of control Scout Mark III, 10 km N Babinda, QLD, 30 September 1987

Investigation number:
Status: Completed
Investigation completed


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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
[Download  PDF: 22KB]
General details
Date: 30 September 1987   Investigation status: Completed  
Time: 1000    
Location: Deeral (10 km N Babinda)    
State: Queensland   Occurrence type: Loss of control  
Release date: 17 December 1987   Occurrence category: Accident  
Report status: Final   Highest injury level: Serious  

Aircraft details

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  
Last update 09 May 2016