Casualties unknown

Aircraft on Flight Following Crashes into Mountainous Terrain at 3,600 Feet (CGUVU)

Cougar, WA, US

On October 1, 1989, a Bellanca 17-30A (registration CGUVU) operated by Edward Shwetz was involved in an aviation accident near Cougar, WA. Investigators recorded the probable cause as: CONTINUED VFR FLIGHT BY THE PILOT INTO INSTRUMENT METEOROLOGICAL CONDITIONS (IMC), AND HIS FAILURE TO MAINTAIN PROPER ALTITUDE/CLEARANCE ABOVE MOUNTAINOUS TERRAIN. THE ADVERSE WEATHER AND TERRAIN WERE RELATED FACTORS. 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 receiving flight following while cruising at 8,500 feet inbound to Portland, Oregon, impacted mountainous terrain at 3,600 feet after descending in search of a cloud opening.

Incident Overview

An aircraft was receiving flight following services while cruising at an altitude of 8,500 feet, inbound to Portland, Oregon. According to the pilot, he was searching for an opening in the cloud layer to descend through. He subsequently initiated a descent to 6,500 feet.

Radar Observations

The radar controller observed the aircraft's track deviating to the north and requested the pilot to report when the aircraft was again headed southbound. However, the aircraft continued in a northerly direction.

Impact

The aircraft subsequently impacted mountainous terrain at an elevation of 3,600 feet while still heading north. The circumstances surrounding the impact indicate a controlled flight into terrain scenario, with the aircraft descending below the surrounding terrain height.

Investigation Details

No information was provided regarding the aircraft type, registration, engine count, date of occurrence, operator, number of occupants, injuries, damage extent, time of day, weather characterization, or air traffic control involvement beyond the noted controller request. The probable cause of the accident was not stated in the source material.

Frequently asked questions

What happened in the 1 Oct 1989 Bellanca 17-30A accident near Cougar, WA?

An aircraft receiving flight following while cruising at 8,500 feet inbound to Portland, Oregon, impacted mountainous terrain at 3,600 feet after descending in search of a cloud opening.

What aircraft was involved and where did it happen?

The accident on 1 Oct 1989 involved a Bellanca 17-30A, registration CGUVU, operated by Edward Shwetz, at Cougar, WA.

What was the probable cause of the accident?

CONTINUED VFR FLIGHT BY THE PILOT INTO INSTRUMENT METEOROLOGICAL CONDITIONS (IMC), AND HIS FAILURE TO MAINTAIN PROPER ALTITUDE/CLEARANCE ABOVE MOUNTAINOUS TERRAIN. THE ADVERSE WEATHER AND TERRAIN WERE RELATED FACTORS.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X29710. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.