Billings – Sheridan – Casper – Cheyenne

On May 27, 1935 at 04:05 PM, Billings – Sheridan – Casper – Cheyenne experienced a crash involving Boeing 221 Monomail, operated by Wyoming Air Service, with the event recorded near Glendo 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, 1 fatalities were recorded, 0 survivors were identified or estimated. This corresponds to an estimated fatality rate of 100.0%.

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

The listed crash cause is human factor. The pilot was performing a mail flight from Billings, Montana, to Cheyenne, Wyoming, with intermediate stops in Sheridan and Casper. While cruising in poor weather conditions, he decided to reduce his altitude to maintain a visual contact with the ground. Eventually, the single engine aircraft hit a hill located 21 kilometers south from Glendo, killing the pilot.

Aircraft reference details include registration NC725W, MSN 1153, year of manufacture 1930.

Geospatial coordinates for this crash are approximately 42.5027°, -105.0261°.