Accident Overview
An airplane impacted terrain after failing to successfully complete an off-airport landing. The landing followed an in-flight engine failure. On-scene investigation found no fuel in the fuel tanks, and no odor of fuel was detected.
Fuel Loss Investigation
The previous evening, after refueling the tanks, the aircraft was left parked on an inclined ramp. According to a service letter issued in 1969, the aircraft lost fuel due to a cross-feed condition into the lower wing fuel bay. This condition occurred when the fuel selector valve was in the 'BOTH ON' position. The service letter warned that the cross-feed condition could result in overfilling of the lower wing tank and cause fuel to drip from the lower wing tip vent.
Sequence of Events
The aircraft departed with presumably insufficient fuel. An in-flight engine failure occurred, and the pilot attempted an off-airport landing. The landing was not successful, and the aircraft impacted terrain.
Conclusion
No further details were provided in the source about the aircraft type, registration, occupants, or injuries. The investigation focused on the fuel loss mechanism.