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1933 United Airlines Boeing 247 mid air explosion

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Passengers  4
Fatalities  7
Aircraft type  Boeing 247D
Number of deaths  7
Operator  United Airlines
Passenger count  4
Crew  3
Survivors  0
Date  10 October 1933
Destination  Oakland
Survivor  0
1933 United Airlines Boeing 247 mid-air explosion httpsuploadwikimediaorgwikipediacommonsthu
Summary  deliberate on-board explosion
Similar  United Airlines Flight 615, United Airlines Flight 2885, United Airlines Flight 859, United Airlines Flight 608, Continental Airlines Flight 1883

On 10 October 1933, a Boeing 247 airliner operated by United Air Lines and registered as NC13304 crashed near Chesterton, Indiana. The transcontinental flight, carrying three crew and four passengers, had originated in Newark, New Jersey, with its final destination in Oakland, California. It had already landed in Cleveland and was headed to its next stop in Chicago when it exploded en route. All aboard died in the crash, which was proven to have been deliberately caused by an on-board explosive device.

Contents

Eyewitnesses on the ground reported hearing an explosion shortly after 9 p.m., and saw the aircraft in flames at an altitude of about 1,000 feet (300 m). A second explosion followed after the aircraft crashed. The crash scene was adjacent to a gravel road about 5 miles (8 km) outside of Chesterton, centered in a wooded area on the Jackson Township farm of James Smiley.

Investigators who combed through the debris were confronted with unusual evidence: the toilet and baggage compartment had been smashed into fragments. Shards of metal riddled the inside of the toilet door while the other side of the door was free of the metal fragments. The tail section had been severed just aft of the toilet and was found mostly intact almost a mile away from the main wreckage.

The incident

Melvin Purvis, head of the Chicago office of the United States Bureau of Investigation, described the damage, "Our investigation convinced me that the tragedy resulted from an explosion somewhere in the region of the baggage compartment in the rear of the aircraft. Everything in front of the compartment was blown forward, everything behind blown backward, and things at the side outward." He also noted: "The gasoline tanks, instead of being blown out, were crushed in, showing there was no explosion in them."

Investigation

An investigator from the Porter County coroner's office, Dr. Carl Davis, and experts from the Crime Detection Laboratory at Northwestern University examined evidence from the crash, and concluded that the crash had been caused by a bomb, with nitroglycerin as the probable explosive agent. One of the passengers was seen carrying a brown package onto the aircraft in Newark, but investigators who found the package amidst the wreckage ruled it out as being the cause of the explosion. A rifle was found in the wreckage but it was determined to have been carried aboard as baggage for a passenger who was en route to attend a shoot at Chicago's North Shore Gun Club. Despite the efforts of the investigators, no suspect was ever identified or charged in this incident, and it remains unsolved. This is thought to be the first proven act of air sabotage in the history of commercial aviation.

Pilot Captain Terrant, his co-pilot, flight attendant Alice Scribner, and all four passengers were killed. Scribner was the first United flight attendant to be killed in an aircraft crash.

References

1933 United Airlines Boeing 247 mid-air explosion Wikipedia


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