Casualties unknown

Non-Instrument Rated Pilot Crashes in Mountainous Terrain Obscured by Low Clouds (N3548E)

Lytle Creek, CA, US

On December 7, 1997, a Cessna 172N (registration N3548E) operated by Vincent J. Kostovny was involved in an aviation accident near Lytle Creek, CA. Investigators recorded the probable cause as: the non-instrument rated pilot's inadvertent VFR flight into instrument meteorological conditions (IMC), and subsequent loss of aircraft control, due to spatial disorientation. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 1 related events involving the same aircraft type or operator are linked below.

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

A non-instrument rated pilot obtained a weather briefing before a cross-country flight. Witnesses heard the impact in mountainous terrain obscured by low clouds. The aircraft descended at a steep angle and was fragmented. No mechanical issues were found.

Incident Overview

A non-instrument rated pilot received a preflight weather briefing prior to departing on a cross-country flight. Approximately 30 minutes after the estimated departure time, witnesses in a mountainous area reported hearing the sound of an aircraft impacting the terrain. The accident site was obscured by low clouds, which hindered both ground and aerial search efforts.

Accident Details

According to witness accounts, the aircraft descended into the mountainous terrain at a steep angle. The impact resulted in extensive fragmentation of the airframe, though all major components were accounted for at the site. Investigators conducted a thorough postaccident examination of the aircraft and engine but found no evidence of a preexisting mechanical condition or failed control system that could have caused the accident.

Investigation Findings

The investigation revealed that the pilot was not instrument rated. The weather conditions at the time included low clouds that obscured the mountainous terrain. No deficiencies in the aircraft's structure, systems, or engine were identified during the postaccident analysis.

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Frequently asked questions

What happened in the 7 Dec 1997 Cessna 172N accident near Lytle Creek, CA?

A non-instrument rated pilot obtained a weather briefing before a cross-country flight. Witnesses heard the impact in mountainous terrain obscured by low clouds. The aircraft descended at a steep angle and was fragmented. No mechanical issues were found.

What aircraft was involved and where did it happen?

The accident on 7 Dec 1997 involved a Cessna 172N, registration N3548E, operated by Vincent J. Kostovny, at Lytle Creek, CA.

What was the probable cause of the accident?

the non-instrument rated pilot's inadvertent VFR flight into instrument meteorological conditions (IMC), and subsequent loss of aircraft control, due to spatial disorientation. Factors relating to the accident were: the adverse weather conditions (low ceiling and fog), and the pilot's lack of instrument experience.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001208X09326. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.