DH8D, Edmonton AB Canada, 2014

DH8D, Edmonton AB Canada, 2014

Summary

On 6 November 2014 a DHC8-400 sustained a burst right main gear tyre during take-off, probably after running over a hard object at high speed and diverted to Edmonton. Shortly after touching down at Edmonton with 'three greens' indicated, the right main gear leg collapsed causing wing and propeller damage and minor injuries to three occupants due to the later. The Investigation concluded that after a high rotational imbalance had been created by the tyre failure, gear collapse on touchdown had been initiated by a rotational speed of the failed tyre/wheel which was similar to one of the natural frequencies of the assembly.

Description

On 6 November 2014, a Bombardier DHC8-400 (C-GGBF) being operated by Jazz Aviation as Air Canada Express flight JZA8481 on a scheduled domestic passenger flight from Calgary to Grande Prairie experienced a sudden failure of one of the main landing gear tyres on departure and because weather conditions precluded a return to Calgary, it was decided to divert to Edmonton where, on landing at night in normal ground visibility, it then suffered a right hand main gear collapse and partially left the runway. The aircraft sustained significant damage and propeller debris which penetrated the cabin wall led to 3 of the 71 passengers sustaining minor injuries and were taken to hospital. The emergency evacuation was quickly accomplished without further injuries occurring.

The aircraft in its final resting position (reproduced from the Official Report)

Investigation

An Investigation was carried out by the Canadian Transport Safety Board. DFDR, QAR and CVR data were recovered and used to assist the Investigation.

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