Jump to Content
Download Final Report
[ Download PDF: 14KB]
The pilot advised Flight Service (FS) that the engine had failed and he was attempting a landing at the Mittagong airstrip. The aircraft subsequently landed approximately 2 km short of the airstrip damaging the left wing tip and landing gear during the rollout. The pilot advised FS of the situation and that there were nil injuries. The initial maintenance investigation discovered that the crankshaft accessory drive gear positioning dowel had sheared. This in turn had ceased the drive to all the engine accessories and the camshaft, resulting in the engine stopping. The initial reason for the failure of the dowel could not be positively determined. Subsequent to the initial investigation, a detailed failure analysis of the failed engine components was carried out. This examination revealed that a significant factor in the failure of the crankshaft gear/crankshaft attachment had been a manufacturing irregularity on the bearing surface of the head of the attaching bolt. The manufacturing irregularity resulted in a reduced clamping force, between the gear and the crankshaft, being established during assembly. The loss of the clamping force had allowed relative movement between the gear and the crankshaft mounted gear positioning dowel. This eventually led to the fatigue failure of the dowel and the loss of integrity of the accessory gear drive assembly.
Download Final Report
[ Download PDF: 14KB]
General details
Date: 18 April 1998 Investigation status: Completed 
Time: 13:30 EST  
 Investigation type: Occurrence Investigation 
 Occurrence type: Forced/precautionary landing 
Release date: 22 January 1999  
Report status: Final Occurrence category: Accident 
Aircraft details
Aircraft manufacturer: Piper Aircraft Corp 
Aircraft model: PA-28-181 
Aircraft registration: VH-NOR 
Sector: Piston 
Damage to aircraft: Substantial 
Departure point:Bankstown NSW
Destination:Bankstown NSW
Share this page Provide feedback on this investigation
Last update 28 October 2014