Introduction
On 26 November 2020, a Calm Air International LP Avions de Transport Régional ATR 42-300 aircraft, registration C-FAFS and serial number 298, was operating as flight CAV464. The flight was conducted under instrument flight rules from Rankin Inlet, Nunavut, to Naujaat, Nunavut, with 3 crew members on board.
Flight Details
During the descent phase, the crew observed abnormally low propeller rpm indications on the left engine. At 1326 Central Standard Time, shortly after touchdown on Runway 34 at Naujaat Airport, the aircraft lost directional control and experienced a runway side excursion on the east side of the runway. The aircraft came to rest approximately 108 feet from the runway edge.
Aftermath
The captain received serious injuries. The aircraft sustained substantial damage. No other injuries were reported among the crew.
Investigation
The investigation was classified as a Class 3 occurrence by the Transportation Safety Board of Canada. The investigation focused on the propeller malfunction, which was identified as the leading factor in the runway excursion. The probable cause attributed to the incident was a propeller malfunction that resulted in asymmetric thrust and loss of control upon landing.