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Accident
Last updated: 20 October 2017
Estado:Final
Fecha:miércoles 20 diciembre 1972
Hora:18:00
Tipo:Silhouette image of generic DC93 model; specific model in this crash may look slightly different
McDonnell Douglas DC-9-31
Operador:North Central Airlines
Registración: N954N
Numéro de série: 47159/231
Año de Construcción: 1968
Horas Totales de la Célula:11812
Motores: 2 Pratt & Whitney JT8D-7
Tripulación:Fatalidades: 0 / Ocupantes: 4
Pasajeros:Fatalidades: 10 / Ocupantes: 41
Total:Fatalidades: 10 / Ocupantes: 45
Daños en la Aeronave: Anulado
Consecuencias: Written off (damaged beyond repair)
Ubicación:Chicago-O'Hare International Airport, IL (ORD) (   Estados Unidos de América)
Fase: Despegue (TOF)
Naturaleza:Vuelo Doméstico Programado
Aeropuerto de Salida:Chicago-O'Hare International Airport, IL (ORD/KORD), Estados Unidos de América
Aeropuerto de Llegada:Madison Regional Airport, WI (MSN/KMSN), Estados Unidos de América
Número de Vuelo: 575
Descripción:
A Delta Air Lines Convair CV-880 (N8807E) taxied across runway 27L in bad weather (250 feet visibility in fog, indefinite ceiling at 200 feet). At the same time, a North Central DC-9 (N954N) took off from runway 27L. Both aircraft collided.

Probable Cause:

PROBABLE CAUSE: "The failure of the air traffic control system to ensure separation of aircraft during a period of restricted visibility. This failure included the following: (1) the controller omitted a critical word which made his transmission to the flight crew of the Delta CV-880 ambiguous; (2) the controller did not use all the available information to determine the location of the CV-880; and (3) the CV-880 flight crew did not request clarification of the controller's communications"

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 197 days (7 months)
Accident number: NTSB/AAR-73-15
Download report: Final report

Fuentes:
» ICAO Circular 132-AN/93 (27-36)
» NTSB/AAR-73/15


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NTSB issued 9 Safety Recommendations

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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 Chicago-O'Hare International Airport, IL to Madison Regional Airport, WI as the crow flies is 173 km (108 miles).

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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