Casualties unknown

Private Pilot Overdue During Night Flight to Rural Airport (N2137G)

Lee Vining, CA, US

On May 6, 1991, a Cessna 182A (registration N2137G) operated by Ronald F. Bonini was involved in an aviation accident near Lee Vining, CA. Investigators recorded the probable cause as: THE FAILURE OF THE PILOT TO MAINTAIN AIRCRAFT CONTROL DUE TO SPATIAL DISORIENTATION DURING A NIGHT APPROACH. 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

A private pilot was reported overdue while returning from a short cross-country flight at night. The aircraft overflew a rural airport on a moonless night, entered a left turn, and struck terrain half a mile from the airport.

Accident Overview

A certificated private pilot was reported overdue while returning from a short cross-country flight to an airport located in an area with little ground illumination during darkness. The surrounding terrain consisted of mountains to the right and a lake to the left of the direction of flight.

Flight Sequence

On a moonless night, the airplane overflew the rural airport and made a left turn to enter the downwind portion of a VFR approach. The terrain and light conditions produced dark and featureless visual conditions.

Wreckage Discovery

The airplane was located the following day. It had struck terrain approximately half a mile from the destination airport while in a high-speed descending left turn.

Pilot Information

The pilot held a private pilot certificate. No further details about the pilot's experience or qualifications were provided in the source material.

Frequently asked questions

What happened in the 6 May 1991 Cessna 182A accident near Lee Vining, CA?

A private pilot was reported overdue while returning from a short cross-country flight at night. The aircraft overflew a rural airport on a moonless night, entered a left turn, and struck terrain half a mile from the airport.

What aircraft was involved and where did it happen?

The accident on 6 May 1991 involved a Cessna 182A, registration N2137G, operated by Ronald F. Bonini, at Lee Vining, CA.

What was the probable cause of the accident?

THE FAILURE OF THE PILOT TO MAINTAIN AIRCRAFT CONTROL DUE TO SPATIAL DISORIENTATION DURING A NIGHT APPROACH.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X17018. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.