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Accident
Last updated: 23 October 2017
Statuts:Enquête Officielle
Date:vendredi 30 mai 2014
Heure:ca 09:30
Type/Sous-type:Silhouette image of generic DH3T model; specific model in this crash may look slightly different
de Havilland Canada DHC-3T Texas Turbine Otter
Compagnie:Alaska Air Taxi
Immatriculation: N3125N
Numéro de série: 394
Année de Fabrication: 1960
Moteurs: 1 Garrett TPE331
Equipage:victimes: 0 / à bord: 1
Passagers:victimes: 0 / à bord: 2
Total:victimes: 0 / à bord: 3
Dégats de l'appareil: Mineurs
Conséquences: Repaired
Lieu de l'accident:près de Homer, AK (   Etats-Unis d'Amérique)
Phase de vol: En vol (ENR)
Nature:Privé
Aéroport de départ:Sedona Airport, AZ (SDX/KSEZ), Etats-Unis d'Amérique
Aéroport de destination:Anchorage-Ted Stevens International Airport, AK (ANC/PANC), Etats-Unis d'Amérique
Détails:
A de Havilland DHC-3T Turbine Otter airplane, experienced an anomalous in-flight vibration and uncommanded nose-down pitch during cruise flight in the vicinity of Homer, Alaska. The airplane sustained substantial damage to the right elevator. The flight departed Seldovia, Alaska, about 0900, en route to Anchorage, Alaska.

According to the pilot, during cruise flight, the airplane vibrated and subsequently pitched nose-down. The pilot applied corrections and continued the flight to the destination. After landing, the pilot and a mechanic examined the airplane and found that the skin on the right elevator servo tab was separated from the hinge, and spar structures inside the right elevator were cracked.


This same aircraft, N3125N, was involved in an accident on 4 June 2015, when during cruise flight, while applying back pressure to the control yoke, a vibration was felt. The pilot immediately reduced power and executed a precautionary landing. After landing it was found that the skin on the right elevator servo tab was fractured and separated from the hinge, and spar structures inside the right elevator were cracked.

Probable Cause:

PROBABLE CAUSE: "The flutter failure of the right elevator servo tab due to the improper fabrication of the servo tab and maintenance personnel’s subsequent failure to detect anomalies with the servo tab."

Sources:
» NTSB


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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 Sedona Airport, AZ et Anchorage-Ted Stevens International Airport, AK est de 3950 km (2468 miles).

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.
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