Northwest Airlines Flight 2 was a Lockheed Super Electra aircraft, registration NC17388, which crashed into the Bridger Mountains in Gallatin County, Montana, about twelve miles (20 km) northeast of Bozeman, on January 10, 1938.

[4] The Monday afternoon flight had just left Butte and was flying over Belgrade when it diverted to the north to avoid a dust storm over Bozeman Pass.

Investigators with the Civil Aeronautics Authority (CAA), a predecessor organization of both the Federal Aviation Administration (FAA) and the National Transportation Safety Board (NTSB), determined that both vertical fins and both rudders were missing from the twin-tailed aircraft.

Weather reports from surrounding communities as well as the existence of the dust storm in Bozeman Pass led investigators to believe that the aircraft likely encountered severe to extreme turbulence which may have initiated the flutter.

[8] The third, Flight 1, crashed shortly after takeoff from Miles City after a design and manufacturing error allowed an intense fire to develop in the cockpit.