Casualties unknown

Accident Involving Unidentified Aircraft on Lake Havasu, July 1986 (N80503)

Havasu Lake, CA, US

On July 6, 1986, a Cessna 172M (registration N80503) operated by Jim Kuhn was involved in an aviation accident near Havasu Lake, CA. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-07-04Data APIEditorial standards

An aircraft crashed into Lake Havasu on July 6, 1986, after circling twice. The pilot and two passengers tested positive for cocaine metabolites.

Accident Details

On July 5, 1986, at approximately 2100 Pacific Daylight Time, an aircraft departed from Lake Havasu City, Arizona, for an unknown destination. The following morning, around 0330, witnesses fishing on Lake Havasu heard the aircraft circle twice before it crashed about two miles west of the airport on the California side of the lake. Weather conditions were clear with a dark night sky.

Impact and Damage

The aircraft impacted in a steep descent and moved only about 20 feet after hitting the ground. Extensive damage was sustained to the nose and forward fuselage. No evidence of preimpact part failure or malfunction was found.

Toxicology and Pilot Information

Toxicology tests conducted on the pilot and two of the four passengers were positive for benzoylecgonine and cocaine. For the pilot, benzoylecgonine levels were 0.46 microgram/milliliter in blood, 0.58 microgram/gram in liver tissue, and 1.3 micrograms/gram in kidney tissue. Cocaine levels were 0.01 microgram/gram in liver tissue and 0.23 microgram/gram in kidney tissue. The pilot possessed a student pilot license that had expired. Three of the four passengers were occupying the two rear seats.

Frequently asked questions

What happened in the 6 Jul 1986 Cessna 172M accident near Havasu Lake, CA?

An aircraft crashed into Lake Havasu on July 6, 1986, after circling twice. The pilot and two passengers tested positive for cocaine metabolites.

What aircraft was involved and where did it happen?

The accident on 6 Jul 1986 involved a Cessna 172M, registration N80503, operated by Jim Kuhn, at Havasu Lake, CA.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X34197. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.