Détails:
A Boeing 727-232, N489DA, operating as Delta flight 1522, a scheduled domestic passenger service from West Palm Beach, Florida, to Atlanta, Georgia, sustained substantial damage when it collided with a tug during pushback at West Palm Beach.
The tug driver who was pushing N489DA from the gate stated that two of the aircraft's engines had been started before pushback due to the aircraft's power unit being inoperative. During the pushback there were two wing walkers. There was not a signal man in front of the aircraft in view of the captain, as required by Delta Air Lines pushback procedures, due to manpower shortages.
He pushed the aircraft straight back and then turned the aircraft's tail to the left. The aircraft and tug made a "U" shape at this time with the tug on the aircraft's right front. As he moved the tug to straighten the aircraft's nose gear, the safety pin on the tug end of the tow bar sheered. He did not believe he turned the nose gear beyond the normal limits; however, it was a "sharp" turn. The aircraft became disconnected from the tug and rolled forward at which time the right front side of the aircraft struck the tug. As the aircraft rolled forward the tug driver's headset cord became disconnected from the aircraft and he lost communication with the cockpit crew. The left wingman arrived at the front of the aircraft at this time and signaled the captain to brake the aircraft and stop it.
The failure of the ground pushback crew to follow Delta Airlines pushback procedures and place a signalman forward of the aircraft in view of the captain during pushback. This resulted in the captain not being aware that the tug tow bar had disconnected and the need for him to apply brakes to stop the aircraft.
| Statuts: | Accident investigation report completed and information captured |
| Date: | mercredi 24 mai 1995 |
| Heure: | 12:48 |
| Type/Sous-type: |  Boeing 727-232 |
| Compagnie: | Delta Air Lines |
| Immatriculation: | N489DA |
| Numéro de série: | 21019/1097 |
| Année de Fabrication: | |
| Heures de vol: | 60114 |
| Equipage: | victimes: 0 / à bord: 6 |
| Passagers: | victimes: 0 / à bord: 130 |
| Total: | victimes: 0 / à bord: 136 |
| Dégats de l'appareil: | Substantiels |
| Conséquences: | Repaired |
| Lieu de l'accident: | West Palm Beach International Airport, FL (PBI) ( Etats-Unis d'Amérique)
|
| Phase de vol: | Au roulage (TXI) |
| Nature: | Transport de Passagers Nat. |
| Aéroport de départ: | West Palm Beach International Airport, FL (PBI/KPBI), Etats-Unis d'Amérique |
| Atlanta-William B. Hartsfield International Airport, GA (ATL/KATL), Etats-Unis d'Amérique | |
| Numéro de vol: | DL1522 |
A Boeing 727-232, N489DA, operating as Delta flight 1522, a scheduled domestic passenger service from West Palm Beach, Florida, to Atlanta, Georgia, sustained substantial damage when it collided with a tug during pushback at West Palm Beach.
The tug driver who was pushing N489DA from the gate stated that two of the aircraft's engines had been started before pushback due to the aircraft's power unit being inoperative. During the pushback there were two wing walkers. There was not a signal man in front of the aircraft in view of the captain, as required by Delta Air Lines pushback procedures, due to manpower shortages.
He pushed the aircraft straight back and then turned the aircraft's tail to the left. The aircraft and tug made a "U" shape at this time with the tug on the aircraft's right front. As he moved the tug to straighten the aircraft's nose gear, the safety pin on the tug end of the tow bar sheered. He did not believe he turned the nose gear beyond the normal limits; however, it was a "sharp" turn. The aircraft became disconnected from the tug and rolled forward at which time the right front side of the aircraft struck the tug. As the aircraft rolled forward the tug driver's headset cord became disconnected from the aircraft and he lost communication with the cockpit crew. The left wingman arrived at the front of the aircraft at this time and signaled the captain to brake the aircraft and stop it.
Probable Cause:
The failure of the ground pushback crew to follow Delta Airlines pushback procedures and place a signalman forward of the aircraft in view of the captain during pushback. This resulted in the captain not being aware that the tug tow bar had disconnected and the need for him to apply brakes to stop the aircraft.
Accident investigation:
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Sources:
» NTSBPhotos
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 West Palm Beach International Airport, FL et Atlanta-William B. Hartsfield International Airport, GA est de 873 km (546 miles).
La distance entre West Palm Beach International Airport, FL et Atlanta-William B. Hartsfield International Airport, GA est de 873 km (546 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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