DEN87FA048

NTSB accident investigation · Cessna 340A · Two Buttes, CO · February 1, 1987

Accident · FatalField investigationFinal report
Date
January 31, 1987, 20:49 local (Feb 1, 1987, 03:49 UTC)
Place
Two Buttes, CO
Injuries
2 fatal
Damage
Destroyed
Aircraft
N6320XCessna 340A
Weather
Instrument (IMC) · Night/dark
Status
Completed · report July 5, 1988
Report
Approved by Office Director
FAA report
19870131001849A
Case key
17094

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Analysis

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.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of control - in flightCruise - normal
Reason for occurrence undeterminedCause
Weather condition - cloudsFactor
Light condition - dark nightFactor
Spatial disorientationPilot in commandFactor
In flight collision with terrain/waterDescent - uncontrolled

Aircraft

Registration
N6320X
Reported as
Cessna 340A
Category
Airplane
Serial number
340A0491
Airframe hours
1,426
Engine
Continental TSIO-520-N, 310 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Registered owner
Wayne A. Bower
Airworthiness certificate
Standard, Normal
Last inspection
Annual · December 11, 1986
Departed
FMN · Farmington, NM
Destination
OJC · Olathe, KS
Flight plan
IFR

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
45
Certificates
Flight instructor, Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
3,500 total · 350 in the last 90 days

Weather

Conditions
Instrument (IMC) · Night/dark
Wind
300° at 7 knots
Visibility
15 statute miles
Lowest ceiling
10,000 ft broken
Temperature
43 °F, dew point 34 °F
Altimeter
29.00 inHg
Observed at
LHK, 62 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N6320X · 1

Matched to the same aircraft by N-number and date.