Casualties unknown

1994-06-11: Cessna 172 (N7112T) — Gregory Calvert — Suisun City, CA

Suisun City, CA, US

On June 11, 1994, a Cessna 172 (registration N7112T) operated by Gregory Calvert was involved in an aviation accident near Suisun City, CA. Investigators recorded the probable cause as: The pilot's failure to maintain control due to falling asleep while operating the aircraft. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards

A pilot conducting a cross-country flight at 4,500 feet msl lost consciousness and crashed into a marsh area approximately 20 minutes after departure. The aircraft was destroyed, but the pilot sustained only minor injuries.

What happened

The pilot was operating an aircraft on a cross-country flight when the incident occurred. At the time of departure, the airplane was climbing to and maintaining an altitude of 4,500 feet mean sea level (msl). The pilot reported that he did not recall any events following the takeoff phase.

Approximately 20 minutes after departing, the aircraft impacted a marsh area. The collision resulted in the total destruction of the airplane. Emergency responders and law enforcement personnel arrived at the scene shortly after the crash.

The investigation

Investigative interviews were conducted with the pilot following the accident. During these discussions, the pilot provided his account of the events leading up to the impact.

Law enforcement officers also spoke with the pilot at the site. He stated that he believed he may have fallen asleep during the flight. No other mechanical failures or environmental factors were cited as contributing to the loss of control.

Findings

The primary factor in this accident was the pilot's lapse in judgment regarding his physical condition while operating the aircraft. The pilot admitted to potentially falling asleep at the controls, which led directly to the uncontrolled descent and subsequent crash into the marsh terrain.

The pilot fell asleep while flying at 4,500 feet msl. This loss of consciousness resulted in the total destruction of the airplane. Despite the severity of the impact, the pilot survived with minor injuries. No fatalities were reported.

Probable cause

The pilot's failure to maintain control due to falling asleep while operating the aircraft.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001206X01568. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.