5 fatalities

1990-04-12: De Havilland DHC-6 Twin Otter (LN-BNS) — Wideroe - Wideroe's Flyveselskap — Værøy (Lofoten Islands), Norway

Værøy (Lofoten Islands), NorwayTakeoff (climb)

On April 12, 1990, a De Havilland DHC-6 Twin Otter (registration LN-BNS) operated by Wideroe - Wideroe's Flyveselskap was involved in an aviation accident near Værøy (Lofoten Islands), Norway during takeoff. 5 people were killed. Investigators recorded the probable cause as: The aircraft encountered wind gusts that exceeded its design limitations, causing a structural failure of the horizontal stabilizer and elevator. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 1781213008Data APIEditorial standards
Aircraft registered LN-BNS
Aircraft registered LN-BNS. Photo: Steve Barnes / CC BY-SA 4.0, via Wikimedia Commons

A flight departing from Værøy Airport entered an uncontrolled descent and crashed into the sea, resulting in the deaths of all five people on board.

What happened

Shortly after departing from runway 25 at Værøy Airport, an aircraft began a left bank before entering a vertical, uncontrolled descent. The incident occurred approximately 1.8 km from the airport while the plane was in its initial climb phase. The impact with the sea resulted in the total destruction of the airframe and five fatalities.

At the time of the takeoff roll, wind conditions were recorded at gusts of 57 knots, which exceeded the maximum permitted limit for ground operations by 7 knots. Following the departure, the aircraft encountered wind gusts of 34 knots, surpassing the maximum allowable flight limit by 14 knots.

Findings

The investigation determined that the extreme wind components during the departure phase led to a structural failure. Specifically, the intense aerodynamic forces caused a break in the horizontal stabilizer and elevator, rendering the aircraft uncontrollable.

Probable cause

The aircraft encountered wind gusts that exceeded its design limitations, causing a structural failure of the horizontal stabilizer and elevator.