Aviation safety investigations & reports

Beechcraft 36, VH-TYZ, 8 Km SW of Beaudesert QLD, 13 May 1984

Investigation number:
Status: Completed
Investigation completed


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Soon after settling in the cruise at 2000 feet, the pilot noticed that the fuel flow was lower than expected. He selected rich mixture but the fuel flow began to fluctuate markedly and the MAP reduced. A short time later the engine began to run roughly, accompanied by a rise in oil pressure and a further reduction in MAP. The pilot elected to return to the departure point. Engine power became inadequate for level flight and the pilot selected an emergency landing area. The aircraft came to rest after running through two barbed wire fences. The engine failed due to long term lack of lubrication to several bearings caused by the rotation of two main bearing shells which covered oil supply galleries. The damage to the main bearing assemblies was such that the cause of bearing shell rotation could not be established.

Download Final Report
[Download  PDF: 22KB]
General details
Date: 13 May 1984   Investigation status: Completed  
Time: 1509    
Location: 8 Km SW of Beaudesert    
State: Queensland    
Release date: 04 June 1985   Occurrence category: Accident  
Report status: Final   Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer Beech Aircraft Corp  
Aircraft model 36  
Aircraft registration VH-TYZ  
Type of operation Charter  
Damage to aircraft Substantial  
Departure point Kooralbyn QLD  
Departure time 1458  
Destination Brisbane QLD  
Last update 01 April 2011