Descripción del Accidente ASN 18 JUN 1986 de Havilland Canada DHC-6 Vista Liner 300 N76GC - Grand Canyon National Park, AZ
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Estado:Accident investigation report completed and information captured
Fecha:mircoles 18 junio 1986
Hora:09:33 MST
Tipo:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Vista Liner 300
Operador:Grand Canyon Airlines
Registración: N76GC
Numéro de série: 248
Año de Construcción: 1969
Horas Totales de la Célula:30569
Motores: 2 Pratt & Whitney Canada PT6A-27
Tripulación:Fatalidades: 2 / Ocupantes: 2
Pasajeros:Fatalidades: 18 / Ocupantes: 18
Total:Fatalidades: 20 / Ocupantes: 20
Víctimas de la colisión:Fatalidades: 5
Daños en la Aeronave: Destruido
Consecuencias: Written off (damaged beyond repair)
Ubicación:Grand Canyon National Park, AZ (   Estados Unidos de América)
Fase: En ruta (ENR)
Naturaleza:Vuelo Doméstico Programado
Aeropuerto de Salida:Grand Canyon-National Park Airport, AZ (GCN/KGCN), Estados Unidos de América
Aeropuerto de Llegada:Grand Canyon-National Park Airport, AZ (GCN/KGCN), Estados Unidos de América
Número de Vuelo: 6
Descripción:
The DHC-6 took off from Grand Canyon-National Park Airport runway 21 at 08:55 for a 50-minute air tour over Grand Canyon National Park. At 09:13 a Helitech Bell 206B JetRanger (N6TC) took off from a heliport near Tusayan for a 30-minute air tour.
Both aircraft collided in the area of the Tonto Plateau, at an altitude of 6500 feet msl. The Bell main rotor blade struck and severed the DHC-6's nosegear. The opposite blade of the Bell struck the aft portion of the fuselage of the DHC-6.
A fuel cell of the Vista Liner was ruptured, creating a vaporous cloud of fuel. The rotor head of the Bell 206 separated and debris from the disintegrating rotor blade struck the left side and tail of the DHC-6. The tail separated, causing the DHC-6 to lose control and pitch over. The aircraft struck the ground in an inverted attitude and the helicopter free-fell to the ground following the rotor blade separation.

Probable Cause:

PROBABLE CAUSE: "The failure of the flight crew of both aircraft to 'see and avoid' each other for undetermined reasons.
Contributing to the accident was the failure of the Federal Aviation Administration to exercise its oversight responsibility over flight operations in the Grand Canyon scenic air tour operators. Also contributing to the accident was the modification and configuration of the routes of the rotary-wing operators resulting in their intersecting with the routes of Grand Canyon Airlines near Crystal Rapids."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 1 months
Accident number: NTSB/AAR-87-03
Download report: Final report

Fuentes:
» ICAO Circular 245-AN/147
» NTSB/AAR-87/03


Subsiguiente / acciones de seguridad

NTSB issued 3 Safety Recommendations

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Fotos

photo of DHC-6-Vista-Liner-300-N76GC
accident date: 18-06-1986
type: de Havilland Canada DHC-6 Vista Liner 300
registration: N76GC
photo of DHC-6-Vista-Liner-300-N386EX
accident date: 18-06-1986
type: de Havilland Canada DHC-6 Vista Liner 300
registration: N386EX
 

Map

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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