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Last updated: 17 January 2022
Statuts:Enquête Officielle
Date:vendredi 15 décembre 1989
Heure:11:48
Type/Sous-type:Silhouette image of generic B744 model; specific model in this crash may look slightly different
Boeing 747-406M
Compagnie:KLM Royal Dutch Airlines
Immatriculation: PH-BFC
Numéro de série: 23982/735
Année de Fabrication: 1989-06-30 (6 months)
Heures de vol:705
Moteurs: 4 General Electric CF6-80C2B1F
Equipage:victimes: 0 / à bord: 14
Passagers:victimes: 0 / à bord: 231
Total:victimes: 0 / à bord: 245
Dégats de l'appareil: Substantiels
Conséquences: Repaired
Lieu de l'accident:près de Anchorage, AK (   Etats-Unis d'Amérique)
Phase de vol: En vol (ENR)
Nature:Transport de Passagers Intern.
Aéroport de départ:Amsterdam-Schiphol International Airport (AMS/EHAM), Pays-Bas
Aéroport de destination:Anchorage International Airport, AK (ANC/PANC), Etats-Unis d'Amérique
Numéro de vol:KL867
Détails:
At FL250 the aircraft flew into a normal looking cloud, which turned out to be a volcanic ash cloud (the result of an eruption of Mount Redoubt). Power was added to climb out of the cloud. About 10-15 seconds later all 4 engines failed and the standby electrical system failed. The crew were able to restart the engines after numerous attempts. The no. 1 and 2 engines were relit while descending through FL130 and the remaining 2 engines were relit at FL110. The aircraft landed safely at Anchorage, substantially damaged by the in-flight blasting by volcanic ash. The windshields were damaged, as were internal aircraft systems, avionics and electronics.

Probable Cause:

PROBABLE CAUSE: "Inadvertent encounter with volcanic ash cloud, which resulted in damage from foreign material (foreign object) and subsequent compressor stalling of all engines. A factor related to the accident was: the lack of available information about the ash cloud to all personnel involved."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 2 years and 7 months
Accident number: ANC90FA020
Download report: Final report

Sources:
» NTSB


Photos

photo of Boeing-747-406-PH-BFC
accident date: 15-12-1989
type: Boeing 747-406
registration: PH-BFC
 

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 Amsterdam-Schiphol International Airport et Anchorage International Airport, AK est de 7147 km (4467 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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