NTSB Identification: DEN87FA048.
The docket is stored on NTSB microfiche number 33750.
Accident occurred Saturday, January 31, 1987 in TWO BUTTES, CO
Probable Cause Approval Date: 07/05/1988
Aircraft: CESSNA 340A, registration: N6320X
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 PLT AND HIS WIFE WERE EN ROUTE FROM PALM SPRINGS, CA, TO OLATHE, KS, AND HAD STOPPED FOR FUEL AT FARMINGTON, NM. AFTER DEPARTURE, THE ACFT WAS EVENTUALLY CLEARED TO FL 210. AT 1934 THE PLT GAVE DENVER ARTCC THE FOLLOWING PIREP: 'THERE'S BEEN SOME SNOW BUT I'VE BEEN MOSTLY IN AND OUT OF THE TOPS. LOOKS LIKE I GOT CLEAR SKIES ABOVE ME MOST OF THE TIME...AND IT IS MODERATELY ROUGH FROM TIME TO TIME.' AT 2045 KANSAS CITY ARTCC ADVISED THE PLT HE WAS AT FL 213. THE PLT ACKNOWLEDGED HE HAD DRIFTED OFF ALT AND WAS CORRECTING AND WAS HEADING 060 DEG. AT 2047 THE CONTROLLER ADVISED THE PLT HE WAS AT FL 203. THE PLT REPLIED, 'WE'VE HAD A GYRO FAILURE.' AT 2049 RADAR CONTACT WAS LOST. THE ACFT IMPACTED AN OPEN FIELD IN A NEAR VERTICAL ATTITUDE. THERE WAS NO EVIDENCE OF AIRFRAME, ENG, PROP, OR FLT CONTROL FAILURE. ONLY ONE VACUUM PUMP WAS RECOVERED. THE INSTRUMENT PANEL AND AUTOPLT SYSTEM WERE DESTROYED.

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

REASON FOR OCCURRENCE UNDETERMINED


Contributing Factors

WEATHER CONDITION..CLOUDS


Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

SPATIAL DISORIENTATION..PILOT IN COMMAND

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