NTSB Identification: SEA83LA032
14 CFR Part 91: General Aviation
Accident occurred Wednesday, December 15, 1982 in CHEMULT, OR
Probable Cause Approval Date: 12/15/1983
Aircraft: HUGHES 369HS, registration: N90876
Injuries: 2 Minor.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE FLT ENCOUNTERED HEAVY SNOW ENROUTE & THE ENG QUIT. DURING THE AUTOROTATION THE PLT MANEUVERED TO AVOID HITTING A RAILROAD SIGNAL TRESTLE BUT STRUCK SEVERAL RAILROAD SIGNAL CABLES & CRASHED. THE ACFT WAS NOT EQUIPPED WITH A PARTICLE SEPARATOR, NOR WAS THE INSTALLED INLET SCREEN DESIGNED TO HANDLE HEAVY SNOW. ADDITIONALLY, THE ACFT WAS NOT EQUIPPED WITH AN AUTO-RELITE SYSTEM. THE AFM PROHIBITS FLT IN FALLING SNOW WITHOUT THE AUTO-RELITE SYSTEM INSTALLED.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

FLIGHT INTO KNOWN ADVERSE WEATHER..CONTINUED..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

FUEL SYSTEM,RAM AIR/INDUCTION AIR..ICE


Contributing Factors

WEATHER CONDITION..SNOW

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