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Last updated: 19 January 2022
Statuts:Enquête Officielle
Date:lundi 17 septembre 1979
Heure:12:26
Type/Sous-type:Silhouette image of generic DC93 model; specific model in this crash may look slightly different
McDonnell Douglas DC-9-32
Compagnie:Air Canada
Immatriculation: CF-TLU
Numéro de série: 47196/288
Année de Fabrication: 1968
Heures de vol:28425
Cycles:26816
Moteurs: 2 Pratt & Whitney JT8D-7B
Equipage:victimes: 0 / à bord: 5
Passagers:victimes: 0 / à bord: 40
Total:victimes: 0 / à bord: 45
Dégats de l'appareil: Substantiels
Conséquences: Repaired
Lieu de l'accident:E of Boston, MA (   Etats-Unis d'Amérique)
Phase de vol: En vol (ENR)
Nature:Transport de Passagers Intern.
Aéroport de départ:Boston-Logan International Airport, MA (BOS/KBOS), Etats-Unis d'Amérique
Aéroport de destination:Yarmouth Airport, NS (YQI/CYQI), Canada
Numéro de vol:AC680
Détails:
At 12:12 local time Air Canada Flight 680, a scheduled passenger flight to Yarmouth, Nova Scotia, Canada, departed Logan International Airport, Boston, Massachusetts, USA. About 14 min after takeoff, at an altitude of about 25,000 ft msl, the tailcone along with the aft cabin pressure access door and a portion of the aft cabin pressure bulkhead separated from the aircraft causing rapid decompression of the passenger and flightcrew compartments. The aircraft was landed safely at Logan International Airport about 38 min after takeoff. Of the 45 persons aboard, one flight attendant received minor injuries during the decompression. The aircraft's oxygen system and its elevator control and engine control systems were damaged.

Probable Cause:

The National Transportation Safety Board determines that the probable cause of the accident was a fatigue fracture of the aft cabin pressure bulkhead which resulted in a rapid decompression of the aircraft's cabin area. This fracture initiated from a crack below the aft bulkhead access door which was discernible on the X-rays taken during the aircraft's last maintenance inspection but was not detected by the inspectors.

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 5 months
Accident number: NTSB/AAR-80-13
Download report: Final report


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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 Boston-Logan International Airport, MA et Yarmouth Airport, NS est de 428 km (268 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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DC-9-30

  • 662 built
  • 26ème loss
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