Cheyenne – Salt Lake City
Flight / Schedule
Cheyenne – Salt Lake City
Aircraft
De Havilland DH.4Registration
179
Operator
U.S. Air Mail ServiceDate
February 14, 1921 at 12:00 AM
Type
CRASHFlight Type
Postal (mail)
Flight Phase
Flight
Crash Site
Mountains
Crash Location
Telephone Canyon Wyoming
Region
North America • United States of America
Coordinates
41.2728°, -105.5004°
Crash Cause
Technical failure
Narrative Report
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°.
Fatalities
Total
0
Crew
0
Passengers
0
Other
0
Crash Summary
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.
Cause: Technical failure
Occupants & Outcome
Crew On Board
1
Passengers On Board
0
Estimated Survivors
1
Fatality Rate
0.0%
Known people on board: 1
Operational Details
Schedule / Flight
Cheyenne – Salt Lake City
Operator
U.S. Air Mail ServiceFlight Type
Postal (mail)
Flight Phase
Flight
Crash Site
Mountains
Region / Country
North America • United States of America
Aircraft Details
Aircraft
De Havilland DH.4Registration
179
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