Aviation safety investigations & reports

Abnormal engine indications involving a S.A.A.B. Aircraft Co SF-340B, VH-OLM, SYDNEY , NSW on 18 November 1992

Investigation number:
Status: Completed
Investigation completed


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Shortly after take-off, whilst climbing through 6000 feet, the left AC generator light illuminated and could not be reset. A loud vibration was heard and felt from the left engine. Visual inspection revealed black smoke coming from the generator vent, and remnants of red hot generator windings against the grill of the vent. There were no fire warnings but the engine was shut down to prevent further damage. The aircraft returned to Sydney where an uneventful single engine landing was carried out. Examination of the generator revealed that the drive end bearing had failed, allowing the rotor to contact the stator. The drive shaft however was reported to be in good condition, having failed to shear and disconnect the generator from the engine as intended. This matter has been referred to the Civil Aviation Authority for resolution with the manufacturer to ensure that the design of the generator drive shaft is suitable for the application.
Download Final Report
[Download  PDF: 11KB]
General details
Date: 18 November 1992   Investigation status: Completed  
Time: 18:20 ESuT    
State: New South Wales   Occurrence type: Abnormal engine indications  
  Occurrence category: Incident  
Report status: Final    

Aircraft details

Aircraft details
Aircraft model SF-340B  
Aircraft registration VH-OLM  
Sector Turboprop  
Damage to aircraft Nil