Aviation safety investigations & reports

Main Landing gear wheel failure - Sydney Airport, NSW 6 February 2009 VH-KDQ Saab 340B

Investigation number:
Status: Completed
Investigation completed


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During the post-flight inspection of a Saab 340B passenger aircraft, the number-two outboard main landing gear wheel was observed to have sustained noticeable damage. The flight crew reported that there was no prior indication of the failure, as the aircraft had handled normally during the landing and taxiing phase of the flight.

Subsequent examination found that the wheel inner rim had fractured away from the hub for approximately one-half of the total circumference. A circumferential fatigue crack had initiated at a location at the bead seat radius, and had propagated until a final ductile overload failure caused a section of the wheel rim to separate.

During the course of the investigation, it was found that the particular wheel design was being phased out due to recognised fatigue problems identified at the bead seat area.

Both the manufacturer and operator were aware of the increased fatigue susceptibility of the earlier wheel design, and had established increased inspection regimes for those wheels remaining in service.

Download Final Report
[Download  PDF: 2.25MB]
General details
Date: 06 February 2009   Investigation status: Completed  
Time: 1435 ESuT   Investigation level: Systemic - click for an explanation of investigation levels  
Location   (show map): Sydney Aerodrome    
State: New South Wales   Occurrence type: Landing gear/indication  
Release date: 17 February 2010   Occurrence category: Incident  
Report status: Final   Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer S.A.A.B. Aircraft Co  
Aircraft model 340  
Aircraft registration VH-KDQ  
Serial number 340B-325  
Type of operation Air Transport Low Capacity  
Damage to aircraft Minor  
Departure point Orange, NSW  
Destination Sydney, NSW  
Last update 03 April 2020