1 fatality

Instructional Flight Struck Tree After Go-Around in Windshear; Instructor Injured, Student Killed (N89834)

Longmont, CO, US

On June 1, 1990, a Cessna 152 (registration N89834) operated by Judson Flying Service was involved in an aviation accident near Longmont, CO. One person was killed. Investigators recorded the probable cause as: THE PILOT CONTINUED INTO HAZARDOUS WEATHER CONDITIONS. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 8 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

During a go-around after encountering windshear on final approach, the flight instructor retracted flaps contrary to procedure, causing the aircraft to settle and hit a tree. The instructor sustained minor injuries, the student fatal injuries, and the aircraft was destroyed.

Incident Details

An instructional flight was concluding with a final approach for landing when the aircraft encountered windshear and microburst activity. The pilot initiated a go-around. At the start of the go-around, the flaps were retracted from full deployment to the up position, which was contrary to published procedures. The aircraft subsequently settled and struck a tree. The flight instructor sustained minor injuries, while the student pilot suffered fatal injuries. The aircraft was destroyed.

Weather Conditions

Prior to the accident, a pilot report (PIREP) was issued warning of high winds, windshear, and strong downdrafts. The National Center for Atmospheric Research reported that a microburst gust front passed through the airport between 1844 and 1846 local time.

Pilot Background

The flight instructor was aware of advisory circulars concerning windshear but did not have a working knowledge of their content.

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Frequently asked questions

What happened in the 1 Jun 1990 Cessna 152 accident near Longmont, CO?

During a go-around after encountering windshear on final approach, the flight instructor retracted flaps contrary to procedure, causing the aircraft to settle and hit a tree. The instructor sustained minor injuries, the student fatal injuries, and the aircraft was destroyed.

Were there any fatalities in the 1 Jun 1990 Cessna 152 accident?

The accident was fatal, resulting in 1 fatality.

What aircraft was involved and where did it happen?

The accident on 1 Jun 1990 involved a Cessna 152, registration N89834, operated by Judson Flying Service, at Longmont, CO.

What was the probable cause of the accident?

THE PILOT CONTINUED INTO HAZARDOUS WEATHER CONDITIONS.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X23126. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.