Investigation number
198400022
Occurrence date
Location
8 Km SW of Beaudesert
Report release date
Report status
Final
Investigation type
Occurrence Investigation
Investigation status
Completed
Occurrence class
Accident
Highest injury level
None

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.

Aircraft Details
Manufacturer
Beech Aircraft Corp
Model
36
Registration
VH-TYZ
Operation type
Charter
Departure point
Kooralbyn QLD
Departure time
1458
Destination
Brisbane QLD
Damage
Substantial