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It was the student's fourth flying lesson and the effects of power were being revised. The student turned the aircraft 90 degrees to the left onto downwind but when he attempted to level the wings after the turn, the bank angle increased from about 30 to 50 degrees. The instructor took over the controls and attempted to recover by applying right aileron, full power and holding the nose up briefly. When the aircraft did not immediately recover, the instructor lowered the nose but the aircraft struck the ground, in a left wing, nose low attitude, before full control could be regained. After revising the effects of power, the engine speed was set too low for the aircraft to sustain a level turn. The student maintained altitude by progressively applying up elevator and the instructor did not notice the incorrect setting because speed was assessed with reference to the ground in a 20 knot tailwind. The instructor delayed taking over the controls, because he thought that the aircraft was being subjected to mechanical turbulence generated by trees, over which they had flown.

Download Final Report
[ Download PDF: 22KB]
 
 
 
 
General details
Date: 16 August 1987 Investigation status: Completed 
Time: 1030 Investigation type: Occurrence Investigation 
Location:"Koongarra" (38 km NNW Warracknabeal) Occurrence type:Loss of control 
State: Victoria Occurrence class: Operational 
Release date: 24 September 1987 Occurrence category: Accident 
Report status: Final Highest injury level: Serious 
 
Aircraft details
Aircraft manufacturer: Unknown 
Aircraft model: Thruster TST 
Aircraft registration: Not Registered AUF NUMBER: 250040 
Type of operation: Sports Aviation 
Damage to aircraft: Destroyed 
Departure point:"Koongarra" VIC
Departure time:1015
Destination:"Koongarra" VIC
 
 
 
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