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Accident
Last updated: 21 October 2017
Status:Definitief
Datum:donderdag 9 mei 1985
Tijd:08:44
Type:Silhouette image of generic CAT model; specific model in this crash may look slightly different
Consolidated PBY-5A Catalina
Luchtvaartmaatschappij:Drilling Muds
Registratie: N84857
Constructienummer: 1522
Bouwjaar:
Aantal vlieguren:1481
Motoren: 2 Pratt & Whitney R-1830-94
Bemanning:slachtoffers: 1 / inzittenden: 2
Passagiers:slachtoffers: 0 / inzittenden: 1
Totaal:slachtoffers: 1 / inzittenden: 3
Schade: Groot
Gevolgen: Written off (damaged beyond repair)
Plaats:Lewistown Municipal Airport, MT (LWT) (   Verenigde Staten)
Fase: Geparkeerd (STD)
Soort vlucht:Onderzoek
Vliegveld van vertrek:Lewistown Municipal Airport, MT (LWT/KLWT), Verenigde Staten
Vliegveld van aankomst:Reno/Tahoe International Airport, NV (RNO/KRNO), Verenigde Staten
Beschrijving:
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

Bronnen:
» NTSB


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Kaart
Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet de exacte vliegroute weer.
De afstand tussen Lewistown Municipal Airport, MT en Reno/Tahoe International Airport, NV bedraagt 1173 km (733 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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