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A Saab 340B passenger aircraft, registered VH-UYA, experienced a left engine malfunction during the take-off roll at Mount Isa airport. In response to the abnormal engine condition, the flight crew rejected the takeoff and shut down the left engine. When the engine was subsequently disassembled by the engine manufacturer, it was revealed that a single stage-four power turbine blade had fractured at the blade root. The liberated airfoil section caused secondary damage to the power turbine and exhaust sections. Metallurgical analysis of the fractured blade revealed that a pre-existing crack had been present at the blade root for a significant period of engine operation prior to the incident malfunction.

Download Final Report
[ Download PDF: 307KB]
General details
Date: 16 December 2006 Investigation status: Completed 
Time: 1050 EST  
Location   (show map):Mount Isa Investigation type: Occurrence Investigation 
State: Queensland Occurrence type: Engine failure or malfunction 
Release date: 04 March 2009 Occurrence class: Technical 
Report status: Final Occurrence category: Serious Incident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: S.A.A.B. Aircraft Co 
Aircraft model: 340 
Aircraft registration: VH-UYA 
Serial number: 340B-357 
Type of operation: Air Transport Low Capacity 
Departure point:Mount Isa, Qld
Destination:Townsville, Qld
Crew details
RoleClass of licenceHours on typeHours total
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Last update 14 November 2018