Cheyenne – Salt Lake City

On February 14, 1921 at 12:00 AM, Cheyenne – Salt Lake City experienced a crash involving De Havilland DH.4, operated by U.S. Air Mail Service, with the event recorded near Telephone Canyon Wyoming.

The flight was categorized as postal (mail) and the reported phase was flight at a mountains crash site.

1 people were known to be on board, 0 fatalities were recorded, 1 survivors were identified or estimated. This corresponds to an estimated fatality rate of 0.0%.

Crew on board: 1, crew fatalities: 0, passengers on board: 0, passenger fatalities: 0, other fatalities: 0.

The listed crash cause is technical failure. En route from Cheyenne to Salt Lake City, the oil pressure dropped to 9 or 10. The engine temperature increased to 192° and the revolutions per minute dropped to 1,200. The plane crashed on a mountain side near Telephone Canyon. The pilot was injured.

Aircraft reference details include registration 179.

Geospatial coordinates for this crash are approximately 41.2728°, -105.5004°.