I had never heard of this one, but in Monday's Kalamazoo Gazette there will be a special article about the crash of Northwest Airlines Flight 2501. From looking it up, I have found that it was a DC-4 flying from New York City to Minneapolis. The plane was lost on June 27, 1950 off the coast of South Haven, Michigan (just under 40 miles West of Kalamazoo) with 58 people on board.
I will try to post a link to the story tomorrow, but I work until 10pm and the newspaper is not published until the afternoon so I will not be able to do it in the morning. If someone else wants to grab it here first, by all means go ahead.