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On 14 January 2008 the pilot of a single-engine Cessna Aircraft Company 208 conducted a successful forced landing back onto the departure runway after the aircraft's engine failed. The flight, with six passengers onboard, had earlier departed Townsville, Qld on a private Instrument Flight Rules (IFR) flight to Mt. Isa.

The evidence showed that the failure of the engine was precipitated by the fracture and separation of a single blade from the compressor turbine (CT) disc. The gross mechanical interference caused by the release of that blade into the confines of the turbine section contributed to the subsequent forced fracture of the other CT blades and the downstream migration of blade debris. The remainder of the internal engine damage was identified as secondary damage as a result of that debris.

Damage to the area of crack initiation limited the extent of examination such that the root cause of fatigue initiation could not be established with certainty. However, from the available evidence, it was considered likely that the crack initiated at a localised area of stress concentration, such as may have arisen from the passage of foreign object debris through the engine, from handling or tooling damage sustained during a prior maintenance activity, or from the effects of an isolated blade casting anomaly that was not evident to the examination.

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General details
Date: 14 January 2008 Investigation status: Completed 
Time: 1035 EST  
Location   (show map):Townsville Airport Investigation type: Occurrence Investigation 
State: Queensland Occurrence type: Engine failure or malfunction 
Release date: 05 June 2009 Occurrence class: Technical 
Report status: Final Occurrence category: Serious Incident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: Cessna Aircraft Company 
Aircraft model: 208 
Aircraft registration: VH-PSQ 
Serial number: 20800213 
Type of operation: Private 
Damage to aircraft: Nil 
Departure point:Townsville, Qld
Destination:Mount Isa, Qld
Crew details
RoleClass of licenceHours on typeHours total
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Last update 14 November 2018