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Accident
Last updated: 11 December 2017
Estado:Final
Fecha:jueves 9 mayo 1985
Hora:08:44
Tipo:Silhouette image of generic CAT model; specific model in this crash may look slightly different
Consolidated PBY-5A Catalina
Operador:Drilling Muds
Registración: N84857
Numéro de série: 1522
Año de Construcción:
Horas Totales de la Célula:1481
Motores: 2 Pratt & Whitney R-1830-94
Tripulación:Fatalidades: 1 / Ocupantes: 2
Pasajeros:Fatalidades: 0 / Ocupantes: 1
Total:Fatalidades: 1 / Ocupantes: 3
Daños en la Aeronave: Considerable
Consecuencias: Written off (damaged beyond repair)
Ubicación:Lewistown Municipal Airport, MT (LWT) (   Estados Unidos de América)
Fase: En Espera (STD)
Naturaleza:Inspección/Búsqueda
Aeropuerto de Salida:Lewistown Municipal Airport, MT (LWT/KLWT), Estados Unidos de América
Aeropuerto de Llegada:Reno/Tahoe International Airport, NV (RNO/KRNO), Estados Unidos de América
Descripción:
During taxi to takeoff the brakes failed. The pilot attempted to groundloop the aircraft, which rolled down hill and collided with a gully. During preflight the co-pilot inadvertently added hydraulic fluid in the alcohol tank. The hydraulic pump cavitated.

Probable Cause:

PROBABLE CAUSE:
aircraft preflight..inadequate..pilot in command
hydraulic system..pressure too low
brakes(emergency)..not used..pilot in command
aircraft service..improper..copilot/second pilot
safety system(other)..not engaged
emergency procedure..not followed..pilot in command
supervision..poor..pilot in command
CONTRIBUTING FACTORS:
fluid,hydraulic..inadequate
acft/equip inadequate,visual restriction..copilot/second pilot
hydraulic system,reservoir..low level
window,inspection/observation..blocked(partial)
crew/group coordination..poor..pilot in command
anti-ice/deice system,propeller..unmarked

Fuentes:
» NTSB


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Map
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 Lewistown Municipal Airport, MT to Reno/Tahoe International Airport, NV as the crow flies is 1173 km (733 miles).

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