Aviation safety investigations & reports

In-flight breakup - Cessna C210, VH-WBZ, 100 km NNW Roma, Qld, 7 December 2011

Investigation number:
AO-2011-160
Status: Completed
Investigation completed

Safety summary

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What happened

On 7 December 2011, the owner-pilot of a Cessna 210M, registered VH-WBZ, was conducting a private flight under the visual flight rules from Roma to Dysart in Queensland. Thunderstorms with associated cloud, rain and severe turbulence were forecast for the area. About 30 minutes into the flight the outer sections of the wings and parts of the tail separated. The aircraft collided with terrain, fatally injuring the pilot.

What the ATSB found

The ATSB established that the aircraft was structurally sound before the wing and tail sections separated. No aircraft system defects were identified. Ground-based weather radar showed thunderstorms in the vicinity of the accident site, and recorded engine data showed cruise power setting was maintained until recording ceased. Although the precise circumstances leading up to the accident were not known, a combination of aircraft airspeed with the effects of turbulence and/or control inputs generated stresses that exceeded the design limits of the aircraft structure.

Safety message

Airspeed is a critical factor in the stress sustained by an aircraft. Pilots need to be aware of the manoeuvring (VA) speed for the aircraft weight, and to control the airspeed so as not to exceed that value when full control deflection is required or severe turbulence or wind/gusts are encountered.

Severe turbulence and wind gusts are just some of the hazards prevalent in and around thunderstorms. This accident is a reminder to all pilots that, to minimise the risk of structural damage or loss of control, thunderstorms should be avoided.

 

Download Final Report
[Download  PDF: 2.81MB]
 
 
Alternate: [Download  DOC: 713KB]
 
General details
Date: 07 December 2011   Investigation status: Completed  
Time: 1530 EST    
Location   (show map): 100 km NNW Roma   Investigation type: Occurrence Investigation  
State: Queensland   Occurrence type: In-flight break-up  
Release date: 09 October 2012   Occurrence class: Operational  
Report status: Final   Occurrence category: Accident  
  Highest injury level: Fatal  

Aircraft details

Aircraft details
Aircraft manufacturer Cessna Aircraft Company  
Aircraft model 210  
Aircraft registration VH-WBZ  
Serial number 21061846  
Type of operation Private  
Damage to aircraft Destroyed  
Departure point Roma, Qld  
Destination Dysart, Qld  
Last update 14 November 2018