DEN90FA120

NTSB accident investigation · Cessna 170A · Dillon, CO · June 3, 1990

Accident · FatalField investigationFinal report
Date
June 2, 1990, 20:15 local (Jun 3, 1990, 02:15 UTC)
Place
Dillon, CO
Injuries
1 fatal
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N3944VCessna 170A
Weather
Visual (VMC) · Day
Status
Completed · report September 5, 1991
Report
Approved by Office Director
FAA report
19900602018149A
Case key
17835

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

On this page

Probable cause

Improper planning/decision by the pilot, and his failure to maintain airspeed, which resulted in an inadvertent stall. Factors related to the accident were: the high density altitude and terrain conditions.

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 flightClimb
Procedures/directives - not followedPilot in command
In-flight planning/decision - improperPilot in commandCause
Weather condition - high density altitudeFactor
Terrain condition - mountainous/hillyFactor
Terrain condition - blind/box canyonFactor
Terrain condition - risingFactor
Proper climb rate - not possiblePilot in command
Airspeed - not maintainedPilot in commandCause
Stall - inadvertentPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - snow covered

Analysis

The plt depd fm Alaska svrl days before the acdnt & was en route to canton, Ohio. On the day of the acdnt, he took off from moab, Utah & was flwg interstate 70 (a major hwy). There were witnesses nr the eisenhower tunnel (evel 11,145 ft) at the Continental divide in Colorado. They saw an acft that matched the description of N3944V. They rprtd the acft was eastbound at low alt as it passed the west entrance, then it began climbing. Before reaching the divide, the acft turnedabruptly north & was last seen flying up a valley. Subsequently, it crashed on a snow field in a bowl area, surrounded on the west, north & east by peaks & ridges. Terrain around the acdnt site rose upward to 13,000 ft. there was evidence the acft had impacted in a steep nose down attitude. During impact, the leading edges of the wings were crushed & the empennage had broken about 4 ft aft of the wings & had folded aft & right. There was evidence the plt had survived the impact, but died from complications of hypothermia. His student plt/med cert had been issued on 4/24/86.

Aircraft

Registration
N3944V
Reported as
Cessna 170A
Category
Airplane
Serial number
18263
Engine
Continental O-300, 165 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Charles L. Guedel
Airworthiness certificate
Standard, Normal
Departed
CNY · Moab, UT

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
39
Medical
Class 2, Expired
Seat
Left
Toxicology
Performed
Flight hours
315 total · 287 in this make and model · 259 as pilot in command · 28 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
200° at 20 knots
Visibility
50 statute miles
Lowest ceiling
None
Temperature
39 °F

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 N3944V · 1

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