NTSB Identification: DEN83FA203.
The docket is stored on NTSB microfiche number 23321.
Accident occurred Wednesday, August 10, 1983 in SEVIER, UT
Aircraft: CESSNA 140A, registration: N5301C
Injuries: 2 Fatal.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE FLT WAS RETURNING TO SAN JOSE,CA AFTER AN EXTENDED X-COUNTRY FLT TO OSHKOSH,WI WHICH BEGAN IN THE LATTER PART OF JULY. EARLIER ON THE DAY OF THE ACCIDENT, AT 0645, THE PLT RECEIVED A WX BRIEFING AT MILES CITY,MT. HE REQUESTED THE GENERAL OUTLOOK TO THE GRAND CANYON & ARIZONA AREA & WAS TOLD OF LARGE BUILDUPS IN WESTERN AZ & NV, FORECAST TO MOVE NE.THE PLT DEPARTED AT 0712 & MADE ENROUTE STOPS AT RIVERTON,WY & ROCK SPRINGS,WY. AT 1845, OVER VERNAL,UT, THE PLT REQUESTED A WX UPDATE. THE ACFT SUBSEQUENTLY IMPACTED A MOUNTAIN AT THE 8,700 FT LEVEL. THERE WAS CONSIDERABLE THUNDERSTORM ACTIVITY THROUGHOUT THE STATE AT THE TIME OF THE ACCIDENT. THE PLT'S BLOOD ALCOHOL LEVEL WAS 0.093%. THE PLT WAS NOT A CFI BUT HAD GIVEN THE STUDENT PLT 29 HRS OF DUAL. HIS LOGBOOK SHOWED THAT HE HAD ALSO GIVEN FLT INSTRUCTION TO OTHER STUDENT PLTS. ON 1/5/83 THE PLT'S DRIVERS LICENSE WAS SUSPENDED INDEFINITELY FOR DRIVING UNDER THE INFLUENCE OF ALCOHOL. HIS BAC WAS REPORTEDLY 0.093%.

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

AIRCRAFT HANDLING..UNCONTROLLED..PILOT IN COMMAND

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

IMPAIRMENT(ALCOHOL)..PILOT IN COMMAND

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:

IMPAIRMENT(ALCOHOL)..PILOT IN COMMAND

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

OVERCONFIDENCE IN PERSONAL ABILITY..PILOT IN COMMAND


Contributing Factors

LIGHT CONDITION..NIGHT


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

WEATHER CONDITION..THUNDERSTORM


Contributing Factors

WEATHER CONDITION..TURBULENCE(THUNDERSTORMS)

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