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Last updated: 18 September 2019
Statuts:Enquête Officielle
Date:vendredi 5 avril 1991
Heure:14:51
Type/Sous-type:Silhouette image of generic E120 model; specific model in this crash may look slightly different
Embraer EMB-120RT Brasilia
Operated by:Atlantic Southeast Airlines - ASA
On behalf of:Delta Connection
Immatriculation: N270AS
Numéro de série: 120218
Année de Fabrication: 1990
Heures de vol:816
Cycles:845
Moteurs: 2 Pratt & Whitney Canada PW118
Equipage:victimes: 3 / à bord: 3
Passagers:victimes: 20 / à bord: 20
Total:victimes: 23 / à bord: 23
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:3 km (1.9 milles) W of Brunswick-Glynco Jetport, GA (BQK) (   Etats-Unis d'Amérique)
Phase de vol: En approche (APR)
Nature:Transport de Passagers Nat.
Aéroport de départ:Atlanta-William B. Hartsfield International Airport, GA (ATL/KATL), Etats-Unis d'Amérique
Aéroport de destination:Brunswick-Glynco Jetport, GA (BQK/KBQK), Etats-Unis d'Amérique
Numéro de vol:2311
Détails:
Flight 2311 was scheduled initially for airplane N228AS to depart at 13:24 EST. Because of mechanical problems an airplane change was made to N270AS. The flight departed Atlanta at 13:47 and arrived in the Brunswick area about 14:44. At 14:48 the flight was cleared for a visual approach to runway 07. The Embraer had just turned from base leg to final approach when the aircraft was seen to pitch up about 5deg and roll to the left until the wings were vertical. The airplane then nosed down into the ground, 9975 feet short of the runway.

Probable Cause:

PROBABLE CAUSE: "The loss of control in flight as a result of a malfunction of the left engine propeller control unit which allowed the propeller blade angles to go below the flight idle position. Contributing to the accident was the deficient design of the propeller control unit by Hamilton Standard and the approval of the design by the Federal Aviation Administration. The design did not correctly evaluate the failure mode that occurred during this flight, which resulted in an uncommanded and uncorrectable movement of the blades of the airplane's left propeller below the flight idle position."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year
Accident number: NTSB/AAR-92-03
Download report: Final report

Sources:
» Aviation Week & Space Technology 15.04.1991 (32)
» NTSB Safety Recommendations A-92-25 through 30
» NTSB/AAR-92/03


Opérations de secours

NTSB issued 6 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 Atlanta-William B. Hartsfield International Airport, GA et Brunswick-Glynco Jetport, GA est de 381 km (238 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.
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Embraer EMB-120

  • 357 built
  • 4ème loss
  • 4ème accident fatal
  • le accident The le plus grave (à ce moment là)
  • le accident 3ème le plus grave (en ce moment)
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