Accident
Last updated: 24 April 2014
Statuts:Enquête Officielle
Date:lundi 5 avril 1976
Heure:08:19 PST
Type/Sous-type:Boeing 727-81
Compagnie:Alaska Airlines
Immatriculation: N124AS
Numéro de série: 18821/124
Année de Fabrication: 1965-03-04 (11 years 1 months)
Heures de vol:25360
Moteurs: 3 Pratt & Whitney JT8D-7A
Equipage:victimes: 0 / à bord: 7
Passagers:victimes: 1 / à bord: 50
Total:victimes: 1 / à bord: 57
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Ketchikan International Airport, AK (KTN) (   Etats-Unis d'Amérique) show on map
Phase de vol: A l'atterrissage (LDG)
Nature:Transport de Passagers Nat.
Aéroport de départ:Juneau International Airport, AK (JNU/PAJN), Etats-Unis d'Amérique
Aéroport de destination:Ketchikan International Airport, AK (KTN/PAKT), Etats-Unis d'Amérique
Numéro de vol: 60
Détails:
Flight 60 was making a runway 11 ILS approach under conditions of low ceilings and low visibility. Descending through 4000 feet visual contact with the ground and water was acquired. The captain decided to proceed visually. The aircraft touched down fast (at 145kts) with a 3 knots tailwind component.
Braking action was poor, so the captain decided to execute a go-around. Ground spoilers were retracted, flaps set at 25deg. The thrust reversers didn't disengage fully, so full take-off thrust couldn't be obtained. Attempts to disengage the reversers failed, so ground spoilers were deployed again. The aircraft overran the wet runway, crossed a gully and a service road, struck the antenna array support structure and continued before ending up in a ravine, 700 feet past the runway.


PROBABLE CAUSE: "The captain's faulty judgement in initiating a go-around after he was committed to a full stop landing following an excessively long and fast touchdown from an unstabilized approach. Contributing to the accident was the pilot's unprofessional decision to abandon the precision approach."

Sources:

Official accident investigation report
investigating agency: National Transport Safety Bureau (NTSB) - USA
report status: Final
report number: NTSB/AAR-76-20
report released:22-DEC-1976
duration of investigation:261 days (8.7 months)
download report: Alaska Airlines, Inc., Boeing 727-81, N124AS, Ketchikan, Alaska, April 5, 1976 (NTSB/AAR-76-20)

Opérations de secours

NTSB issued 3 Safety Recommendations

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Photos

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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 Juneau International Airport, AK et Ketchikan International Airport, AK est de 373 km (233 miles).

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