<P> In its final report, issued on April 11, 1973, the Board determined the following Probable Cause for the accident: </P> <P> "The inability of the crew to feather the left propeller, in combination with the descent of the aircraft below the prescribed minimum altitudes for the approach . The Board is unable to determine why the left propeller could not be feathered ." </P> <P> The Board also found the following Contributing Factors: </P> <P> "Contributing causal factors for the nonstandard approach were the captain's preoccupation with a cruise pitch lock malfunction, the first officer's failure to adhere to company altitude awareness procedures, and the captain's failure to delegate any meaningful responsibilities to the copilot which resulted in a lack of effective task sharing during the emergency . Also, the Board was unable to determine why the propeller pitch lock malfunctioned during the descent ." </P>

A nightmare fell from the sky '72 mohawk airlines crash killed 17