On 26 November 2020, abnormally low left engine propeller speed was observed as an ATR 42-300 descended into Naujaat with other engine parameters normal. Relevant abnormal procedures were not referred to and on reverse pitch selection after touchdown, neither pilot noticed the left engine indication was not illuminated. The aircraft veered off the left side of the runway into snow and the aircraft was substantially damaged and the Captain seriously injured. The accident was attributed to the crew’s initial failure to consult potentially applicable abnormal procedures and then failure to make the required check of symmetric reverse pitch before selection.