Statuts: | Accident investigation report completed and information captured |
Date: | mercredi 10 juillet 1991 |
Heure: | 18:12 |
Type/Sous-type: | Beechcraft C99 Commuter |
Compagnie: | L'Express Airlines |
Immatriculation: | N7217L |
Numéro de série: | U-226 |
Année de Fabrication: | 1984 |
Moteurs: | 2 Pratt & Whitney Canada PT6A-36 |
Equipage: | victimes: 1 / à bord: 2 |
Passagers: | victimes: 12 / à bord: 13 |
Total: | victimes: 13 / à bord: 15 |
Dégats de l'appareil: | Détruit |
Conséquences: | Written off (damaged beyond repair) |
Lieu de l'accident: | 11 km (6.9 milles) SW of Birmingham Airport, AL (BHM) ( Etats-Unis d'Amérique)
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Phase de vol: | En approche (APR) |
Nature: | Transport de Passagers Nat. |
Aéroport de départ: | Mobile Municipal Airport, AL (MOB/KMOB), Etats-Unis d'Amérique |
Aéroport de destination: | Birmingham Airport, AL (BHM/KBHM), Etats-Unis d'Amérique |
Numéro de vol: | 508 |
Détails: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:
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Investigating agency: | NTSB |
Status: | Investigation completed |
Duration: | 237 days (8 months) | Accident number: | NTSB/AAR-92-01 | Download report: | Final report
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Sources:
» CNN
» NTSB Safety Recommendations A-92-18 through -20
» NTSB/AAR-92/01
» Scramble Vol.13, nr.05
Opérations de secours
NTSB issued 3 Safety Recommendations
Issued: 29-APR-1992 | To: FAA | A-92-18 |
DEVELOP AND INSTITUTE CRITERIA THROUGH A JOINT GOVERNMENT/INDUSTRY EFFORT THAT CAN BE USED BY FLIGHTCREWS TO EVALUATE OR INDEX THE EXTENT OF THUNDERSTORM HAZARDS PRESENT TO ASSIST THEM IN THE GO/NO GO DECISION MAKING PROCESS. (Closed - Acceptable Alternate Action) |
Issued: 29-APR-1992 | To: FAA | A-92-19 |
REQUIRE THAT AIRLINE AIRBORNE WEATHER RADAR TRAINING PROGRAMS INCLUDE INFORMATION ON THE SPECIFIC TYPES OF RADAR THAT THE FLIGHTCREW WILL BE USING AND REQUIRE THAT INFORMATION ON THE LIMITATIONS AND RECOMMENDED OPERATING PROCEDURES FOR THE RADAR BE REFERENCED DURING THE TRAINING FROM INFORMATION PROVIDED BY THE MANUFACTURER OF THE RADAR. (Closed - Acceptable Action) |
Issued: 29-APR-1992 | To: FAA | A-92-20 |
REQUIRE THAT RECURRENT TRAINING AND PROFICIENCY PROGRAMS FOR INSTRUMENT RATED PILOTS INCLUDE TECHNIQUES FOR RECOGNIZING AND RECOVERING FROM UNUSUAL ATTITUDES. (Closed - Unacceptable Action) |
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Photos
accident date:
10-07-1991type: Beechcraft C99
registration: N7217L
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 Mobile Municipal Airport, AL et Birmingham Airport, AL est de 346 km (217 miles).
Accident location: Exact; as reported in the official accident report.
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.