On Jan. 15, a Yeti Airlines ATR-72 crashed in Nepal, killing the majority of passengers onboard. Now, three weeks after the crash, investigators have released a preliminary report, saying that both engine propellers were placed into the "feather" position prior to the crash. Prop feathering on turboprop aircraft usually occurs in the event of an engine failure or at shut-down. It is not clear at this time what caused both operating engines to feather their propellers. The investigation is still ongoing.
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