DEN86LA168

NTSB accident investigation · Cessna 172K · Bosler, WY · June 21, 1986

Accident · Minor injuriesLimited investigationFinal report
Date
June 21, 1986, 08:00 local (14:00 UTC)
Place
Bosler, WY
Injuries
2 minor
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N79221Cessna 172K
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19860621027059A
Case key
16986

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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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.

In flight encounter with weatherTakeoff - initial climb
Weather condition - gustsFactor
Preflight planning/preparation - poorPilot in commandCause
Terrain condition - ditchFactor
Weather condition - high density altitudeFactor
In flight collision with terrain/waterDescent - uncontrolled
Ground loop/swerve - inadvertentPilot in command

Analysis

According to the plt, the acft had just become airborne when it encountered a gust of wind while simultaneously crossing a gully, lost lift & descended until ground contact. The plt also indicated there was a 'density altitude problem.' The density altitude was calculated to be about 9,100 ft.

Aircraft

Registration
N79221
Reported as
Cessna 172K
Category
Airplane
Serial number
17257973
Airframe hours
3,400
Engine
Lycoming O-360-A4A, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Norman R. Tilford
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 17, 1986 · 16 hours before
Destination
BO; · Billings, MT

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
51
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
794 total · 794 in this make and model · 790 as pilot in command · 63 in the last 90 days · 8 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
250° at 5 knots, gusting 10
Visibility
40 statute miles
Lowest ceiling
None
Temperature
63 °F

FAA reports on this event · 1

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