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Accident
Last updated: 14 December 2017
Status:Schlussbericht
Datum:Donnerstag 29 Dezember 1955
Zeit:12:40
Flugzeugtyp:Silhouette image of generic L18 model; specific model in this crash may look slightly different
Lockheed 18-56-23 Lodestar
Fluggesellschaft:Gulf Oil Corporation
Kennzeichen: N33366
Werknummer: 18-2387
Baujahr: 1943
Triebwerk: 2 Wright R-1820-72
Besatzung:Todesopfer: 2 / Insassen: 2
Fluggäste:Todesopfer: 0 / Insassen: 0
Gesamt:Todesopfer: 2 / Insassen: 2
Sachschaden: Zerstört
Konsequenzen: Written off (damaged beyond repair)
Unfallort:7,5 km (4.7 Meilen) NW of Londonderry, OH (   USA)
Flugphase: Während des Fluges (ENR)
Betriebsart:Geschäftsflug
Flug von:Tulsa International Airport, OK (TUL/KTUL), USA
Flug nach:Pittsburgh International Airport, PA (PIT/KPIT), USA
Unfallbericht:
The flight departed Tulsa at 18:10 CST and routine position reports were made until over Dayton, Ohio, at 12:00. Over Dayton the aircraft entered icing conditions at the cruise altitude of 9000 feet. The crew requested permission twice to descend to a lower altitude to evade the icing conditions, but these requests were turned down. Around 12:35 the pilot reported "Difficulty maintaining altitude and airspeed request lower altitude." At 12:37 Columbus CAA cleared the flight to descend to 8,000 feet msl. At approximately 12:40 witnesses observed the aircraft below the overcast; it was on a westerly heading and was descending although it appeared to be in a normal attitude. Several components were seen to separate from the aircraft before it struck the ground in a steep angle.

Probable Cause:

PROBABLE CAUSE: "The Board determines that the probable cause of this accident was the accumulation of enough ice to result in loss of control and the subsequent shedding of vertical surfaces from the tail group of the aircraft."

Informationsquelle:
» CAB File No. 2-0061


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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 Tulsa International Airport, OK to Pittsburgh International Airport, PA as the crow flies is 1434 km (896 miles).

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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