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3 fatalities

Controlled Flight Into Terrain During VFR Approach Near Yopal Airport (HK-2889X)

Yopal, ColombiaLanding (descent or approach)

On July 4, 1991, a De Havilland DHC-6 Twin Otter (registration HK-2889X) operated by Helicol Colombia - Helicopteros Nacionales de Colombia was involved in an aviation accident near Yopal, Colombia during landing or approach. 3 people were killed. Investigators recorded the probable cause as: Controlled flight into terrain following a VFR approach in IMC conditions. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 2 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Source recordUpdated 2026-07-04Data APIEditorial standards

An aircraft on a VFR approach to Yopal Airport in poor weather deviated left and struck a mountain slope, killing all three occupants. The aircraft was destroyed.

Accident Summary

While conducting a visual flight rules (VFR) approach to Yopal Airport in poor weather conditions, the aircraft collided with the slope of a mountain located approximately 8 km from the airstrip. The impact destroyed the aircraft and resulted in the death of all three occupants. At the time of the accident, the aircraft had deviated 20° to the left of its intended course.

Investigation

Investigators were unable to determine the exact cause of the deviation. Possible explanations considered include strong winds or the crew's decision to avoid adverse weather. The official probable cause was determined to be controlled flight into terrain following a VFR approach in instrument meteorological conditions (IMC).

Controlled flight into terrain

Related events

Same operator

Frequently asked questions

What happened in the 4 Jul 1991 De Havilland DHC-6 Twin Otter accident near Yopal, Colombia?

An aircraft on a VFR approach to Yopal Airport in poor weather deviated left and struck a mountain slope, killing all three occupants. The aircraft was destroyed.

Were there any fatalities in the 4 Jul 1991 De Havilland DHC-6 Twin Otter accident?

The accident was fatal, resulting in 3 fatalities.

What aircraft was involved and where did it happen?

The accident on 4 Jul 1991 involved a De Havilland DHC-6 Twin Otter, registration HK-2889X, operated by Helicol Colombia - Helicopteros Nacionales de Colombia, at Yopal, Colombia.

What was the probable cause of the accident?

Controlled flight into terrain following a VFR approach in IMC conditions.

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