4 fatalities

Twin-Engine Airplane Strikes Mountain Near Cordova Airport, Killing Four (N1171L)

Cordova, United States of AmericaLanding (descent or approach)

On July 18, 1974, a Cessna 414 Chancellor (registration N1171L) operated by Tesoro Alaskan Petroleum Company was involved in an aviation accident near Cordova, United States of America during landing or approach. 4 people were killed. Investigators recorded the probable cause as: Descended into mountain on approach after the pilot failed to follow the approved procedures. Contributing factors: Improper IFR operation, Low ceiling, High obstructions, Failed to execute published instrument approach. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A).

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 2026-06-12Data APIEditorial standards

A twin-engine airplane struck a cloud-shrouded mountain slope while descending to Cordova Airport in poor weather. The aircraft was destroyed, and all four occupants were killed.

Accident Details

On approach to Cordova Airport, a twin-engine airplane encountered poor weather conditions as it descended. The aircraft struck the slope of a mountain shrouded in clouds, located a few miles from the airfield. The impact destroyed the airplane and resulted in the deaths of all four occupants.

Probable Cause and Contributing Factors

According to the official investigation, the probable cause of the accident was that the pilot descended into the mountain on approach after failing to follow approved procedures. Contributing factors identified include improper IFR operation, low ceiling, high obstructions, and failure to execute the published instrument approach. The weather conditions, characterized by low cloud ceilings and poor visibility, were noted as environmental factors but not specified further in terms of time of day or atmospheric details.

Operational Context

The accident occurred during a descent to Cordova Airport. The aircraft was a twin-engine airplane, but the specific type, registration, and operator were not disclosed in the official report. No information was provided regarding the date, time of day, or any communications with air traffic control. The report focused on the procedural deviations and environmental obstacles that led to the collision with terrain.