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Accident
Last updated: 23 September 2017
Statuts:Enquête Officielle
Date:lundi 5 avril 1976
Heure:08:19
Type/Sous-type:Silhouette image of generic B721 model; specific model in this crash may look slightly different
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: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Ketchikan International Airport, AK (KTN) (   Etats-Unis d'Amérique)
Élévation des lieux de l'accident: 27 m (89 feet) amsl
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 takeoff 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:

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."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 261 days (9 months)
Accident number: NTSB/AAR-76-20
Download report: Final report


Opérations de secours

NTSB issued 3 Safety Recommendations

Show all AD's and Safety Recommendations

Photos

photo of Boeing 727-81 N124AS
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Aircraft history
date registration operator remarks
04 MAR 1965 JA8301 All Nippon Airways
31 MAY 1972 N124 Pacific Southwest Airlines
22 JUN 1972 N124 Alaska Airlines leased
30 NOV 1972 XA-SEB Mexicana sub leased
10 JAN 1974 N124 Alaska Airlines returned
14 DEC 1975 N124AS Alaska Airlines new registration

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 Juneau International Airport, AK et Ketchikan International Airport, AK est de 373 km (233 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.
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Boeing 727

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  • 25ème loss
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