Casualties unknown

Aircraft Icing Encounter Leads to Bluff Impact During Landing Attempt (N4935J)

Evanston, WY, US

On November 5, 1992, a Piper PA-28R-180 (registration N4935J) operated by Aero Center 1, Inc was involved in an aviation accident near Evanston, WY. Investigators recorded the probable cause as: THE PILOT'S DISREGARD OF HAZARDOUS WEATHER ADVISORY, RESULTING IN FLT INTO FORECAST ICING CONDITIONS IN AN ACFT NOT EQUIPPED OR CERTIFIED FOR THE FLT, AND THE IMPROPER INFLT PLANNING BY PILOT DURING THE VFR APPROACH THAT RESULTED IN IMPACT WITH TERRAIN SHORT… 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 pilot flying an aircraft not certified for icing conditions encountered moderate icing, requested vectors to an airport, and after circling to scrape ice, descended below the runway level on a bluff, impacting the side 1/2 mile from the runway.

Flight Preparation

The pilot obtained a weather briefing, filed a flight plan, and departed on an instrument flight rules (IFR) cross-country flight into an area where moderate icing conditions were forecast. The aircraft was not equipped or certified for flight into known icing conditions.

Inflight Icing Encounter

During the flight, the pilot encountered aircraft icing. He requested radar vectors to the nearest airport and was cleared for an instrument approach for landing.

Approach and Landing Attempt

After flying the instrument approach, the pilot circled in visual meteorological conditions (VMC) while scraping ice from the windshield to improve visibility for landing. During this maneuver, the aircraft descended below the level of the airport, which was located on a bluff. The aircraft was unable to climb to reach the runway for landing.

Impact

The aircraft impacted on the side of the bluff approximately one half mile from the runway.

Frequently asked questions

What happened in the 5 Nov 1992 Piper PA-28R-180 accident near Evanston, WY?

A pilot flying an aircraft not certified for icing conditions encountered moderate icing, requested vectors to an airport, and after circling to scrape ice, descended below the runway level on a bluff, impacting the side 1/2 mile from the runway.

What aircraft was involved and where did it happen?

The accident on 5 Nov 1992 involved a Piper PA-28R-180, registration N4935J, operated by Aero Center 1, Inc, at Evanston, WY.

What was the probable cause of the accident?

THE PILOT'S DISREGARD OF HAZARDOUS WEATHER ADVISORY, RESULTING IN FLT INTO FORECAST ICING CONDITIONS IN AN ACFT NOT EQUIPPED OR CERTIFIED FOR THE FLT, AND THE IMPROPER INFLT PLANNING BY PILOT DURING THE VFR APPROACH THAT RESULTED IN IMPACT WITH TERRAIN SHORT OF THE RUNWAY. A FACTOR RELATING TO THE ACCIDENT WAS THE…

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X16101. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.