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Last updated: 25 September 2021
Statuts:Enquête Officielle
Date:jeudi 17 août 1995
Heure:18:27
Type/Sous-type:Silhouette image of generic SF34 model; specific model in this crash may look slightly different
Saab 340A
Compagnie:Business Express Airlines
Immatriculation: N742BA
Numéro de série: 340A-092
Année de Fabrication:
Heures de vol:16806
Equipage:victimes: 0 / à bord: 3
Passagers:victimes: 0 / à bord: 28
Total:victimes: 0 / à bord: 31
Dégats de l'appareil: Substantiels
Conséquences: Repaired
Lieu de l'accident:Philadelphia International Airport, PA (PHL) (   Etats-Unis d'Amérique)
Phase de vol: En attente (STD)
Nature:Transport de Passagers Nat.
Aéroport de départ:Philadelphia International Airport, PA (PHL/KPHL), Etats-Unis d'Amérique
Aéroport de destination:New York-John F. Kennedy International Airport, NY (JFK/KJFK), Etats-Unis d'Amérique
Numéro de vol:426
Détails:
A Saab 340A, N742BA, operated by Business Express Airlines as Flight 426, was substantially damaged by a wing fire, while standing with engines running at the Philadelphia International Airport (PHL), Pennsylvania. The airline transport captain, first officer, flight attendant, and 28 passengers were not injured.
According to statements provided by the captain, the engine start and taxi to runway 9L were normal. The taxi was accomplished with the left engine propeller feathered, and both air conditioners powered by the left engine bleed air. The airplane was number three in line for takeoff, and was stopped on taxiway Kilo.
While stopped, the right stall fail caution light illuminated, followed by the tail pipe hot light, 5 to 6 seconds later. The flight attendant confirmed a fire near the left engine.
The captain and first officer (FO) shut down both engines; however, the FO was not able to activate the left engine fire bottle, due to safety wire on the switch. The right engine fire bottle was then directed to the left engine.
Airport emergency equipment responded and extinguished the fire. The crew and passengers evacuated the airplane through the right forward emergency exit window without injury.

Examination of the airplane revealed that a fire had occurred aft of the left engine nacelle, between the wing and flap panel. The fire had propagated inboard about 4 feet, between the trailing edge of the wing and the flap panel. Fire damage included the aft wing spar, flap panel, upper trailing edge of the wing, two wiring bundles, and the hydraulic flap and brake lines. The wires for the Tail Pipe Hot warning light were a part of one of the burned wiring bundles.

Probable Cause:

PROBABLE CAUSE: "The failure of a titanium hydraulic line, which resulted in an uncontained hydraulic fluid wing fire. A factor was the use of a procedure by the operator, approved by the FAA, but not approved by the airplane manufacturer, which resulted in compartment temperatures reaching 204 degrees C, where the failed line sprayed the hydraulic fluid."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 228 days (8 months)
Accident number: NYC95LA197
Download report: Summary report

Sources:
» NTSB


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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 Philadelphia International Airport, PA et New York-John F. Kennedy International Airport, NY est de 150 km (93 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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