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Last updated: 18 November 2019
Statuts:Enquête Officielle
Date:lundi 21 août 1995
Heure:12:53
Type/Sous-type:Silhouette image of generic E120 model; specific model in this crash may look slightly different
Embraer EMB-120ER Brasilia
Operated by:Atlantic Southeast Airlines - ASA
On behalf of:Delta Connection
Immatriculation: N256AS
Numéro de série: 120122
Année de Fabrication: 1989
Heures de vol:17151
Cycles:18171
Moteurs: 2 Pratt & Whitney Canada PW118
Equipage:victimes: 1 / à bord: 3
Passagers:victimes: 7 / à bord: 26
Total:victimes: 8 / à bord: 29
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:13 km (8.1 milles) W of Carrollton, GA (   Etats-Unis d'Amérique)
Phase de vol: En vol (ENR)
Nature:Transport de Passagers Nat.
Aéroport de départ:Atlanta-William B. Hartsfield International Airport, GA (ATL/KATL), Etats-Unis d'Amérique
Aéroport de destination:Gulfport-Biloxi Regional Airport, MS (GPT/KGPT), Etats-Unis d'Amérique
Numéro de vol: 529
Détails:
ASA Flight 529 left Atlanta (ATL) at 12:23 for a 1 hour and 26 minute flight to Gulfport (GPT). At 12:42 the flight was cleared to climb to FL240.
When climbing through FL181, at a speed of 160 knots, the no. 1 engine torque fell from 63% to 0% and a loud thud was heard. The Brasilia rolled left, pitched down and started to descend. With a loud bang, one of the four blades (Hamilton Standard 14RF-9) had separated. The prop couldn't be feathered and an emergency was declared. The aircraft descended at a rate of 1000-2000 ft/min. The Brasilia appeared to be too difficult to control to reach Atlanta. ATC provided flight 529 with vectors to West Georgia Regional Airport. At 12:53 the airspeed steadily decreased from 168 knots to 120 knots IAS. One minute later, the aircraft contacted trees in a 20 degree nose-down attitude and an increasing left-wing-down attitude of 15-40deg. The Embraer flew another 360 feet before crashing into a field.

Probable Cause:

PROBABLE CAUSE: "The in-flight fatigue fracture and separation of a propeller blade resulting in distortion of the left engine nacelle, causing excessive drag, loss of wing lift, and reduced directional control of the airplane. The fracture was caused by a fatigue crack from multiple corrosion pits that were not discovered by Hamilton Standard because of inadequate and ineffective corporate inspection and repair techniques, training, documentation and communication.
Contributing to the accident was Hamilton Standard's and FAA's failure to require recurrent on-wing ultrasonic inspections for the affected propellers. Contributing to the severity of the accident was the overcast cloud ceiling at the accident site."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 3 months
Accident number: NTSB/AAR-96-06
Download report: Final report

Sources:
» NTSB/AAR-96/06


Opérations de secours

NTSB issued 13 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 Gulfport-Biloxi Regional Airport, MS est de 563 km (352 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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