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Last updated: 3 December 2021
Estado:Final
Fecha:miércoles 10 julio 1991
Hora:18:12
Tipo:Silhouette image of generic BE99 model; specific model in this crash may look slightly different
Beechcraft C99 Commuter
Operador:L'Express Airlines
Registración: N7217L
Numéro de série: U-226
Año de Construcción: 1984
Motores: 2 Pratt & Whitney Canada PT6A-36
Tripulación:Fatalidades: 1 / Ocupantes: 2
Pasajeros:Fatalidades: 12 / Ocupantes: 13
Total:Fatalidades: 13 / Ocupantes: 15
Daños en la Aeronave: Destruido
Consecuencias: Written off (damaged beyond repair)
Ubicación:11 km (6.9 milles) SW of Birmingham Airport, AL (BHM) (   Estados Unidos de América)
Fase: Aproximación (APR)
Naturaleza:Vuelo Doméstico Programado
Aeropuerto de Salida:Mobile Municipal Airport, AL (MOB/KMOB), Estados Unidos de América
Aeropuerto de Llegada:Birmingham Airport, AL (BHM/KBHM), Estados Unidos de América
Número de Vuelo: 508
Descripción:
The Beechcraft took off from Mobile at 17:05 for the last leg of the New Orleans-Mobile-Birmingham flight. Weather was bad around the Birmingham airport as flight 508 approached. Three aircraft had diverted to another airport, a Piper Aerostar had landed prior to the accident, a Gates LearJet after the accident. The weather reported to the crew at 18:05 was 1100 feet overcast, 2,5 miles visibility, thunderstorm and rainshower wind 340/12 kts.
An upset occurred as the flight entered an area of thunderstorm activity. The aircraft rolled left and pitched up as the aircraft approached level flight with approx. 30deg of left bank. The aircraft then entered a stall (or a prestall buffet) and started to descend. The descent couldn't be arrested and the aircraft crashed into a residential area, destroying two homes and two automobiles.

Probable Cause:

PROBABLE CAUSE: "The decision of the captain to initiate and continue an instrument approach into clearly identified thunderstorm activity, thunderstorm activity, resulting in a loss of control of the airplane from which the flight crew was unable to recover and subsequent collision with obstacles and the terrain."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 237 days (8 months)
Accident number: NTSB/AAR-92-01
Download report: Final report

Fuentes:
» CNN
» NTSB Safety Recommendations A-92-18 through -20
» NTSB/AAR-92/01
» Scramble Vol.13, nr.05


Subsiguiente / acciones de seguridad

NTSB issued 3 Safety Recommendations

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Fotos

photo of Beechcraft-C99-N7217L
accident date: 10-07-1991
type: Beechcraft C99
registration: N7217L
 

Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Mobile Municipal Airport, AL to Birmingham Airport, AL as the crow flies is 346 km (217 miles).
Accident location: Exact; as reported in the official accident report.

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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Beech 99

  • 239 built
  • 31st loss
  • 17th accidente fatal
  • 6th worst accident
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