Casualties unknown

Night Flight Ends in Collision with Trees and Terrain Near Destination (N739YG)

Arroyo Grande, CA, US

On September 5, 1991, a Cessna 172 (registration N739YG) operated by Novo Helicopters, Inc. was involved in an aviation accident near Arroyo Grande, CA. Investigators recorded the probable cause as: THE PILOT'S FAILURE TO MAINTAIN A PROPER ALTITUDE, AND CONTINUED FLIGHT INTO INSTRUMENT METEOROLOGICAL CONDITIONS. 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 private pilot on a night flight in a rental aircraft collided with trees and terrain near the destination airport after being advised of IFR conditions and thunderstorms. Witnesses reported very foggy conditions with half-mile visibility.

Incident Overview

A private pilot with 100 hours of flight experience was conducting a night flight in a rental aircraft. Prior to departure, the pilot received a limited preflight weather briefing. During the briefing, the pilot was informed that AIRMET Sierra was in effect, indicating general instrument flight rules (IFR) conditions along the intended route. Additionally, a SIGMET had been issued for thunderstorm activity along the route.

Flight and Arrival

The pilot arrived at the destination airport late in the evening. According to witnesses at the destination, the weather was very foggy, with visibility reported at approximately half a mile.

Collision

Shortly thereafter, the aircraft collided with trees and terrain near the destination airport. The specific circumstances leading to the collision are not detailed in the available information.

Investigation

The accident investigation source provides no analysis, conclusions, or probable cause. The report only documents the sequence of events as described above. No determination has been made regarding causal factors.

Note

This article is based solely on the official accident investigation source and does not include any inferred or additional information.

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Frequently asked questions

What happened in the 5 Sept 1991 Cessna 172 accident near Arroyo Grande, CA?

A private pilot on a night flight in a rental aircraft collided with trees and terrain near the destination airport after being advised of IFR conditions and thunderstorms. Witnesses reported very foggy conditions with half-mile visibility.

What aircraft was involved and where did it happen?

The accident on 5 Sept 1991 involved a Cessna 172, registration N739YG, operated by Novo Helicopters, Inc., at Arroyo Grande, CA.

What was the probable cause of the accident?

THE PILOT'S FAILURE TO MAINTAIN A PROPER ALTITUDE, AND CONTINUED FLIGHT INTO INSTRUMENT METEOROLOGICAL CONDITIONS.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X18114. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.