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The aircraft was cruising at 4000 feet above mean sea level when there was a complete loss of engine power. The pilot turned the aircraft towards the Tamala Station strip and attempted to restart the engine. The restart was unsuccessful and the pilot established the aircraft on a straight in approach to the strip for an emergency landing towards the south. The approach appeared to be proceeding safely until the aircraft entered an area of mechanical turbulence and stronger headwinds. As a result the height loss was greater than anticipated and the aircraft touched down, in what appeared to be a smooth grassy area, 100 metres short of the threshold. During the landing roll the aircraft collided with hidden rocks causing the nose and right hand landing gear to collapse. The surface wind at the time of the accident, a sea breeze, was 180 degrees at 15 knots. This wind at 4000 feet was approximately 120 degrees at 15 knots and the difference was not visible to the pilot. The investigation disclosed that the engine failure occurred following a fatigue failure of the crankshaft between the No. 2 big end journal and the No. 2 main bearing. There was some evidence which indicated that the shaft failure was initiated by loose No. 2 main bearing crankcase through bolts although this evidence was not conclusive. It could not be determined when the through bolts may have been torqued incorrectly; however, it was found that the No. 4 and 6 cylinders had been replaced at an overseas locality on the 25 June 1989 during the aircraft's delivery flight to Australia.

Download Final Report
[ Download PDF: 24KB]
 
 
 
 
General details
Date: 09 October 1989 Investigation status: Completed 
Time: 1130 Investigation type: Occurrence Investigation 
Location:Tamala Station 120km N of Kalbarri  
State: Western Australia  
Release date: 10 May 1991 Occurrence category: Accident 
Report status: Final Highest injury level: None 
 
Aircraft details
Aircraft manufacturer: Cessna Aircraft Company 
Aircraft model: 207 
Aircraft registration: VH-MKY 
Serial number: 340 
Type of operation: Charter 
Damage to aircraft: Substantial 
Departure point:Kalbarri WA
Departure time:N/A
Destination:Kalbarri WA
 
 
 
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