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Shortly after takeoff and while climbing through 2000 feet at approximately 90 kts in light to moderate turbulence, the aircraft encountered unforecast, unavoidable severe turbulence. The aircraft suddenly rolled approximately 75 degrees to the left, and the pilot applied full right control wheel rotation and full right rudder. Control was regained, but during the latter part of the flight the pilot noticed a change in the directional flight characteristics of the aircraft. The turbulence appeared to have been associated with the development of localised "dust devils" or "willy-willies", which had not reached the visible stage. Subsequent examination of the aircraft revealed distortions in the right wing and empennage, consistent with the aircraft having suffered excessive inflight loads. The horn balance of the right elevator was bent, and the internal balance weight was loose. Weather conditions at the time of the occurrence were scattered cumulus, base 5000 feet; visibility 40 kms; surface wind, a gusty south-easterly; and temperature 25 degrees. The Manoeuvering Speed, Va, was estimated to be 100 kts for the weight of the aircraft at the time the turbulence was encountered.

Download Final Report
[ Download PDF: 23KB]
General details
Date: 02 March 1988 Investigation status: Completed 
Time: 1406  
Location:7 km S Watheroo Investigation type: Occurrence Investigation 
State: Western Australia  
Release date: 01 July 1988 Occurrence class: Operational 
Report status: Final Occurrence category: Accident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: Cessna Aircraft Company 
Aircraft model: 182 
Aircraft registration: VH-XYZ 
Serial number: 18268185 
Type of operation: Aerial Work 
Damage to aircraft: Substantial 
Departure point:Watheroo WA
Departure time:1403
Destination:Jandakot WA
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