Vliegtuigongeval op 17 SEP 1979 met McDonnell Douglas DC-9-32 CF-TLU - Boston, MA
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Status:Accident investigation report completed and information captured
Datum:maandag 17 september 1979
Type:Silhouette image of generic DC93 model; specific model in this crash may look slightly different
McDonnell Douglas DC-9-32
Luchtvaartmaatschappij:Air Canada
Registratie: CF-TLU
Constructienummer: 47196/288
Bouwjaar: 1968
Aantal vlieguren:28425
Aantal vluchten:26816
Motoren: 2 Pratt & Whitney JT8D-7B
Bemanning:slachtoffers: 0 / inzittenden: 5
Passagiers:slachtoffers: 0 / inzittenden: 40
Totaal:slachtoffers: 0 / inzittenden: 45
Schade: Groot
Gevolgen: Repaired
Plaats:E of Boston, MA (   Verenigde Staten)
Fase: Kruisvlucht (ENR)
Soort vlucht:Internationale lijnvlucht
Vliegveld van vertrek:Boston-Logan International Airport, MA (BOS/KBOS), Verenigde Staten
Vliegveld van aankomst:Yarmouth Airport, NS (YQI/CYQI), Canada
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:

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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Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet de exacte vliegroute weer.
De afstand tussen Boston-Logan International Airport, MA en Yarmouth Airport, NS bedraagt 428 km (268 miles).

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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