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Accident description
Last updated: 21 October 2017
Status:Final
Date:Thursday 12 September 1946
Time:13:42
Type:Silhouette image of generic DC4 model; specific model in this crash may look slightly different
Douglas C-54A-10-DC (DC-4)
Operator:Pennsylvania-Central Airlines
Registration: NX91068
C/n / msn: 10342
First flight: 1944
Total airframe hrs:3598
Engines: 4 Pratt & Whitney R-2000-7
Crew:Fatalities: 0 / Occupants: 4
Passengers:Fatalities: 0 / Occupants: 0
Total:Fatalities: 0 / Occupants: 4
Airplane damage: Damaged beyond repair
Location:Washington-National Airport, DC (DCA) (   United States of America)
Phase: Approach (APR)
Nature:Training
Departure airport:Washington-National Airport, DC (DCA/KDCA), United States of America
Destination airport:Washington-National Airport, DC (DCA/KDCA), United States of America
Narrative:
A no. 4 engine fire forced the crew to land immediately at Washington-National. The fire was fed by fuel and oil escaping from melted and burned fuel and oil line connections. The engine separated from the wing just prior to touchdown.

Probable Cause:

PROBABLE CAUSE: "The Board determines that the probable cause of this accident was the failure in the No. 4 engine of the exhaust valve of the No. 2 cylinder and the exhaust connection of the No. 1 cylinder which resulted in fire in flight. A contributing factor was the inadequacy of the seal between the firewall and nacelle skin and between individual cowl panels which permitted the fire eventually to reach Zone 3 and to become uncontrollable."

Classification:

Engine separation
Forced landing on runway

Sources:
» CAB File No. 3894-46


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