Amateur-built RV7 N1218B accident near Huntsville, Alabama

Probable cause

The pilot’s impairment due to the effects of ethanol, which resulted in a loss of airplane control and an impact with terrain on approach to landing.

NTSB analysis

Review of flight track data for the personal flight showed that the airplane flew on an easterly course for about 3 hours before the airplane’s altitude, heading, and groundspeed began to deviate. The airplane overflew the intended destination airport, circled several times, and impacted terrain about 600 ft short of a private airstrip about 16 nautical miles to the northeast of the intended airport.

Postaccident examination of the wreckage revealed no preimpact anomalies or malfunctions that would have precluded normal flight. The pilot stated that he had not eaten on the day of the accident, had consumed one beer before the accident flight, and had consumed additional alcoholic beverages in the airplane during the flight. The pilot recalled nothing from the last portion of the flight; however, evidence (open alcohol containers found in the wreckage) confirmed that he had consumed alcohol during the flight.

Toxicology testing detected ethanol in the pilot’s blood at 0.172 gm/dL and his urine at 0.267 gm/dL. These concentrations were four to five times higher than the Federal Aviation Administration’s regulatory limit of 0.04 gm/dL; such concentrations would be impairing, and the pilot likely experienced degraded judgment and deficient coordination, psychomotor skills, perception, and attention. The airplane’s flightpath also demonstrated pilot impairment due to alcohol consumption before and during the flight. In addition, open alcohol containers were recovered in the wreckage, and the pilot admitted to consuming alcohol before and during the flight. The pilot likely experienced alcohol-related difficulties with cognitive and motor skills and was thus unable to safely manage the flight, resulting in a subsequent loss of airplane control.

Text from the NTSB. Open the NTSB docket for ERA22LA213 for the full record.