Détails:
Pan Am flight 843 experienced an explosive disintegration of the third stage turbine disk of the No. 4 engine. The accident occurred shortly after takeoff from San Francisco, at an altitude of about 800 feet above the ground.
Disintegration of the turbine disk was followed by a fire in the No. 4 engine area and an explosion in the outboard reserve fuel tank. The No. 4 engine and approximately 25 feet of the right outer wing separated from the aircraft.
The fire was extinguished and a successful emergency landing was accomplished at Travis Air Force Base, California, with no injuries to the 143 passengers or 10 crewmembers aboard the flight.
PROBABLE CAUSE: "The failure of the third stage turbine disk. This failure was caused by a transient loss of operating clearance between the third stage turbine disk and the third stage inner sealing ring. This loss of clearance resulted from a combination of improper turbine rotor positioning during engine assembly, the use of serviceable worn parts, and an operating clearance which was less than predicted in design analysis."
» Life 26.7.1965
accident date: 28-06-1965
type: Boeing 707-321B
registration: N761PA
| Statuts: | Accident investigation report completed and information captured |
| Date: | lundi 28 juin 1965 |
| Heure: | 14:13 |
| Type/Sous-type: |  Boeing 707-321B |
| Compagnie: | Pan American World Airways (Pan Am) |
| Immatriculation: | N761PA |
| Numéro de série: | 18336/270 |
| Année de Fabrication: | 1962 |
| Heures de vol: | 12789 |
| Equipage: | victimes: 0 / à bord: 10 |
| Passagers: | victimes: 0 / à bord: 143 |
| Total: | victimes: 0 / à bord: 153 |
| Dégats de l'appareil: | Substantiels |
| Conséquences: | Repaired |
| Lieu de l'accident: | près de San Francisco, CA ( Etats-Unis d'Amérique)
|
| Phase de vol: | En vol (ENR) |
| Nature: | Transport de Passagers Nat. |
| Aéroport de départ: | San Francisco International Airport, CA (SFO/KSFO), Etats-Unis d'Amérique |
| Honolulu International Airport, HI (HNL/PHNL), Etats-Unis d'Amérique | |
| Numéro de vol: | PA843 |
Pan Am flight 843 experienced an explosive disintegration of the third stage turbine disk of the No. 4 engine. The accident occurred shortly after takeoff from San Francisco, at an altitude of about 800 feet above the ground.
Disintegration of the turbine disk was followed by a fire in the No. 4 engine area and an explosion in the outboard reserve fuel tank. The No. 4 engine and approximately 25 feet of the right outer wing separated from the aircraft.
The fire was extinguished and a successful emergency landing was accomplished at Travis Air Force Base, California, with no injuries to the 143 passengers or 10 crewmembers aboard the flight.
Probable Cause:
PROBABLE CAUSE: "The failure of the third stage turbine disk. This failure was caused by a transient loss of operating clearance between the third stage turbine disk and the third stage inner sealing ring. This loss of clearance resulted from a combination of improper turbine rotor positioning during engine assembly, the use of serviceable worn parts, and an operating clearance which was less than predicted in design analysis."
Accident investigation:
|
Sources:
» CAB accident report» Life 26.7.1965
Photos
accident date: 28-06-1965
type: Boeing 707-321B
registration: N761PA
Video, social media
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 San Francisco International Airport, CA et Honolulu International Airport, HI est de 3831 km (2395 miles).
La distance entre San Francisco International Airport, CA et Honolulu International Airport, HI est de 3831 km (2395 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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