3 fatalities

Collision with Trees During Approach at Patterson Airport (N444PA)

Patterson-Harry P. Williams, United States of AmericaLanding (descent or approach)

On October 20, 1983, a Mitsubishi MU-2 Marquise (registration N444PA) operated by Wil-Mc Oil Company was involved in an aviation accident near Patterson-Harry P. Williams, United States of America during landing or approach. 3 people were killed. Investigators recorded the probable cause as: Occurrence #1: in flight collision with object. Phase of operation: approach - VFR pattern - base turn. Findings: 1. (f) weather condition - low ceiling; 2. (c) altitude - misjudged - pilot in command; 3. Object - tree(s). This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A).

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary report: the U.S. National Transportation Safety Board (NTSB) historical archiveUpdated 2026-07-04Data APIEditorial standards

While descending to Patterson Airport on an IFR flight plan, a Mitsubishi pilot canceled IFR for a VFR approach and struck trees on base leg for runway 05, killing all three occupants.

Flight Details

The aircraft was operating under an IFR flight plan and was descending into the Patterson area. The pilot received clearance to hold and was informed that he would be the second aircraft for an approach to Patterson Airport. Minutes later, the pilot inquired about the delay, then stated he had the airport in sight, canceled IFR, and proceeded under VFR.

Accident Sequence

A pilot who had just departed Patterson Airport heard a transmission from a Mitsubishi aircraft stating 'turning base.' However, the departing pilot could not see any aircraft on base leg for runway 05 and attempted to contact the Mitsubishi but received no reply. The aircraft subsequently contacted trees while on a heading of approximately 225°. The flaps were extended approximately 5° and the landing gear were extended. All three occupants were killed.

Probable Cause

The official investigation determined the probable cause to be an in-flight collision with objects during the approach—VFR pattern, base turn phase. Specific findings included a low ceiling, misjudgment of altitude by the pilot in command, and the presence of trees.

Frequently asked questions

What happened in the 20 Oct 1983 Mitsubishi MU-2 Marquise accident near Patterson-Harry P. Williams, United States of America?

While descending to Patterson Airport on an IFR flight plan, a Mitsubishi pilot canceled IFR for a VFR approach and struck trees on base leg for runway 05, killing all three occupants.

Were there any fatalities in the 20 Oct 1983 Mitsubishi MU-2 Marquise accident?

The accident was fatal, resulting in 3 fatalities.

What aircraft was involved and where did it happen?

The accident on 20 Oct 1983 involved a Mitsubishi MU-2 Marquise, registration N444PA, operated by Wil-Mc Oil Company, at Patterson-Harry P. Williams, United States of America.

What was the probable cause of the accident?

Occurrence #1: in flight collision with object. Phase of operation: approach - VFR pattern - base turn. Findings: 1. (f) weather condition - low ceiling; 2. (c) altitude - misjudged - pilot in command; 3. Object - tree(s).