ASN logo
Accident
Last updated: 14 December 2017
Statuts:Enquête Officielle
Date:jeudi 12 avril 1990
Heure:14:44
Type/Sous-type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 300
Compagnie:Widerøes Flyveselskap
Immatriculation: LN-BNS
Numéro de série: 536
Année de Fabrication: 1977
Heures de vol:27304
Cycles:58709
Moteurs: 2 Pratt & Whitney Canada PT6A-27
Equipage:victimes: 2 / à bord: 2
Passagers:victimes: 3 / à bord: 3
Total:victimes: 5 / à bord: 5
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:1,8 km (1.1 milles) W de Værøy-Stolport Airport (VRY) (   Norvège)
Phase de vol: En montée initiale (ICL)
Nature:Transport de Passagers Nat.
Aéroport de départ:Værøy-Stolport Airport (VRY/ENVY), Norvège
Aéroport de destination:Bodø Airport (BOO/ENBO), Norvège
Numéro de vol: 839
Détails:
A de Havilland Canada DHC-6 Twin Otter 300 passenger plane, registered LN-BNS, was destroyed in a loss of control accident off Værøy, Norway. All three passengers and two crew members were killed.
Widerøes flight WF839 arrived at Værøy-Stolport Airport (VRY) at 14:30 in gusty conditions. Three passengers deplaned, two came on board. After the airplane was fueled, it taxied out for the last leg to Bodø Airport (BOO). The following wind conditions were radioed to the crew: "wind variable middle direction 250 at 21 max 57". The crew asked for confirmation that the wind was gusting to 57 knots, which was confirmed. The wind force of 57 kts was 7 knots over the allowed to operate the aircraft on the ground. The crew taxied to runway 25 and were given a new wind measurement for the west end of the airfield with variable orientation (varied within 210°-290°) and gusts of 34 knots. This wind speed was 14 kts over the company limit for departures.
The pilot in command commenced takeoff and reported rolling at 14:42. After takeoff the airplane turned to the west and climbed over sea. It entered an area of severe turbulence/wind shear and the crew had difficulty to control the airplane. The forces imposed on the airframe exceeded the design strength leading to an overload failure of the tail surface or elevator, or both.
The plane hit the sea in a left banking attitude, nose down and at a high vertical speed.

Probable Cause:

CAUSE: "The cause of the accident was that the plane during departure came into the wind that exceeded the aircraft's design criteria. Thus there was a break in the horizontal stabilizer / elevator which meant that the plane could no longer be controlled."

Accident investigation:
cover
Investigating agency: HSL Norway
Status: Investigation completed
Accident number: Hav 01/91
Download report: Final report

Sources:
» Scramble Vol.11, nr.12


Photos

photo of de Havilland Canada DHC-6 Twin Otter 300 LN-BNS
Add your photo of this accident or aircraft
 

Plan
Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Værøy-Stolport Airport et Bodø Airport est de 85 km (53 miles).
Accident location: Exact; deduced from official accident report.

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
languages: languages

Share