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On 10 May 2013, at about 2000 Eastern Standard Time, a Sunstate Airlines Bombardier DHC‑8‑402 aircraft, registered VH‑QOD (QOD), departed Townsville on a scheduled passenger flight to Cairns, Queensland. 

About 20 minutes into the flight, the aircraft was in the cruise at FL 180 and flying in clear air when the aircraft encountered light turbulence. The captain immediately switched on the seat belt sign. A second later, the aircraft encountered abrupt severe turbulence.

 The autopilot disconnected and the captain, as pilot flying, assumed manual control of the aircraft. The flight crew reduced the speed of the aircraft to below the turbulence penetration speed. The turbulence event lasted about 10 seconds, during which time the aircraft climbed about 400 ft above the cruising altitude. The flight crew then re-engaged the autopilot and returned the aircraft to the assigned level.

The weather radar did not show any significant weather for the entire flight. Both members of the cabin crew were standing when the aircraft encountered the turbulence and impacted the roof before falling to the floor. Both sustained head injuries and one was knocked unconscious.

The aircraft landed in Cairns about 20 minutes later, without further incident and the cabin crew were transferred to hospital.

In this event, all passengers were seated with their seat belts fastened, even though the seat belt sign had been switched off earlier. The fact that none of the passengers were injured highlights the benefits of keeping your seatbelt fastened during the flight.

Cabin crew are at greater risk of injury during turbulence encounters as they are moving around the cabin and not seated with a seat belt fastened.

 

Aviation Short Investigation Bulletin - Issue 23

Download Final Report
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General details
Date: 10 May 2013 Investigation status: Completed 
Time: 2017 EST Investigation type: Occurrence Investigation 
Location   (show map):91 km north of Townsville Occurrence type:Turbulence/windshear/microburst 
State: Queensland Occurrence class: Environment 
Release date: 31 October 2013 Occurrence category: Serious Incident 
Report status: Final Highest injury level: None 
 
Aircraft details
Aircraft manufacturer: Bombardier Inc 
Aircraft model: DHC-8 
Aircraft registration: VH-QOD 
Serial number: 4123 
Operator: Sunstate Airlines 
Type of operation: Air Transport High Capacity 
Sector: Turboprop 
Damage to aircraft: Nil 
Departure point:Townsville, Qld
Destination:Cairns, Qld
 
 
 
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Last update 06 June 2014