Accident
Last updated: 26 October 2014
Statuts:Enquête Officielle
Date:dimanche 17 juin 1979
Heure:22:48
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:Air New England
Immatriculation: N383EX
Numéro de série: 245
Année de Fabrication: 1969
Heures de vol:17058
Moteurs: 2 Pratt & Whitney Canada PT6A-27
Equipage:victimes: 1 / à bord: 2
Passagers:victimes: 0 / à bord: 8
Total:victimes: 1 / à bord: 10
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Hyannis, MA (   Etats-Unis d'Amérique)
Phase de vol: En approche (APR)
Nature:Transport de Passagers Nat.
Aéroport de départ:New York-La Guardia Airport, NY (LGA/KLGA), Etats-Unis d'Amérique
Aéroport de destination:Hyannis-Barnstable Airport, MA (HYA/KHYA), Etats-Unis d'Amérique
Numéro de vol: 248
Détails:
The flight crew reported for duty at 08:45 in the morning for 12 legs out of Hyannis, MA. They arrived back at Hyannis at 18:31. The crew then learned they were had to fly 2 additional flights of 2 legs each (Hyannis-New Bedford-New York-LGA v.v.) The captain was visibly upset about this. On the return flight from La Guardia the crew decided to skip New Bedford because of poor weather there. At 21:32 the flight departed La Guardia for Hyannis. At 22.39 the crew were given Hyannis weather, which included: indefinite ceiling of 200 feet, sky obscured, visibility 3/4mile in fog, wind 210deg at 10 knots. Five minutes later the aircraft was vectored for a runway 24 ILS approach. The aircraft descended below the glidepath and crashed into a heavily wooded area.

PROBABLE CAUSE: "The failure of the flight crew to recognize and react in a timely manner to the gross deviation from acceptable approach parameters, resulting in a continuation of the descent well below the decision height during a precision approach without visual contact with the runway environment.
Although the Board was unable to determine conclusively the reason for the failure to recognize and react to the gross deviation, it is believed that the degraded physiological condition of the captain seriously impaired his performance. Also, the lack of adequate crew coordination practices and procedures contributed to the first officer's failure to detect and react to the situation in a timely manner."

Sources:
» Flight International 08.03.1980 (732)
» NTSB-AAR-80-1

Official accident investigation report
investigating agency: National Transport Safety Bureau (NTSB) - United States of America
report status: Final
report number: NTSB/AAR-80-01
report released:03-JAN-1980
duration of investigation:200 days (6.7 months)
download report: Air New England, Inc., DeHavilland DHC-6-300, N383 EX Hyannis, Massachusetts, June 17, 1979. (NTSB/AAR-80-01)
cover

Photos

photo of de Havilland Canada DHC-6 Twin Otter 300 N383EX
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Plan
Ce plan montre l'aéroport de départ ainsi que la supposé destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre New York-La Guardia Airport, NY et Hyannis-Barnstable Airport, MA est de 314 km (196 miles).

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