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Last updated: 24 September 2021
Statuts:Enquête Officielle
Date:jeudi 3 avril 1997
Heure:19:55
Type/Sous-type:Silhouette image of generic C650 model; specific model in this crash may look slightly different
Cessna 650 Citation III
Compagnie:Mercury Communications
Immatriculation: N553AC
Numéro de série: 650-0198
Année de Fabrication:
Heures de vol:2128
Equipage:victimes: 0 / à bord: 2
Passagers:victimes: 0 / à bord: 1
Total:victimes: 0 / à bord: 3
Dégats de l'appareil: Substantiels
Conséquences: Repaired
Lieu de l'accident:Buffalo-Greater Buffalo International Airport, NY (BUF) (   Etats-Unis d'Amérique)
Phase de vol: En approche (APR)
Nature:Affaires
Aéroport de départ:Wellsville Municipal Airport, NY (ELZ/KELZ), Etats-Unis d'Amérique
Aéroport de destination:Buffalo-Greater Buffalo International Airport, NY (BUF/KBUF), Etats-Unis d'Amérique
Détails:
A Cessna 650 Citation III, N553AC, was substantially damaged by a fire while on approach to Buffalo, New York. The two certificated airline transport rated pilots, and one passenger were not injured.
The flight originated in Coudersport, Pennsylvania, with two passengers onboard. An intermediate stop was made at Wellsville, New York, and one passenger exited the airplane. The flight then continued on to Buffalo.
While being vectored for the final approach in visual conditions, at night, the flight crew lost radio contact with the control tower and smelled smoke aboard the airplane. They continued the approach and landed, and after reaching their parking space, were notified by ground personnel of flames penetrating the top of the aft fuselage between the engines. The fire was extinguished by airport fire fighting personnel.
Postaccident investigation found a hydraulic return line in the aft equipment bay had evidence of electrical arcing and a small hole through which fluid could escape. An 115-volt electrical line used to heat the horizontal stabilizer also had evidence of rubbing on its surface. In addition to the hydraulic fluid, a pressurized fuel line to the APU was damaged by the fire and leaking fuel. A test simulating an electrical line arcing with a leaking hydraulic line resulted in a fire during each of the three tests. The production standards that Cessna used did not specify a minimum space between electrical lines and flammable fluid lines. The FAA had certified the airplane without requiring Cessna to specify a minimum spacing between electrical lines and flammable fluid lines.

Probable Cause:

PROBABLE CAUSE: "A combination hydraulic fluid and fuel-fed fire which originated from electrical arcing, due to the lack of an adequate production standard from Cessna for the separation of flammable fluid lines and electrical lines. A factor was the lack of oversight from the FAA, which allowed Cessna to space the flammable fluid lines and electrical lines at too close a position."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year
Accident number: NYC97LA068
Download report: Summary report

Sources:
» NTSB


Opérations de secours

NTSB issued 2 Safety Recommendations

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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 Wellsville Municipal Airport, NY et Buffalo-Greater Buffalo International Airport, NY est de 110 km (69 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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