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Criminal Occurrence
Last updated: 21 October 2017
Status:
Datum:Dienstag 1 November 1955
Zeit:19:03 MST
Flugzeugtyp:Silhouette image of generic DC6 model; specific model in this crash may look slightly different
Douglas DC-6B
Fluggesellschaft:United Airlines
Kennzeichen: N37559
Werknummer: 43538/224
Baujahr: 1952
Triebwerk: 4 Pratt & Whitney R-2800
Besatzung:Todesopfer: 5 / Insassen: 5
Fluggäste:Todesopfer: 39 / Insassen: 39
Gesamt:Todesopfer: 44 / Insassen: 44
Sachschaden: Zerstört
Konsequenzen: Written off (damaged beyond repair)
Unfallort:Longmont, CO (   USA)
Flugphase: Während des Fluges (ENR)
Betriebsart:Inländischer planmäßiger Passagierflug
Flug von:Denver-Stapleton International Airport, CO (DEN/KDEN), USA
Flug nach:Portland International Airport, OR (PDX/KPDX), USA
Flugnummer:UA629
Unfallbericht:
Crashed following the in-flight detonation of a bomb.

On November 14, 1955, agents of the Federal Bureau of Investigation (FBI) took into custody John G. Graham, the son of one of the passengers. Thereafter, he was indicted for acts leading to the destruction of the aircraft by means of a bomb explosion.
Graham, who held a grudge against his mother as the result of an unhappy childhood, was the beneficiary of both her life insurance policies and her will. He wrapped dynamite sticks as a Christmas present.

Probable Cause:

PROBABLE CAUSE: "The disintegrating force of a dynamite bomb explosion which occurred in the no. 4 baggage compartment."

Informationsquelle:
» ICAO Accident Digest Circular 50-AN/45 (201-203)


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This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Denver-Stapleton International Airport, CO to Portland International Airport, OR as the crow flies is 1570 km (981 miles).
Accident location: Approximate; accuracy within a few kilometers.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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Douglas DC-6

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