DEN82FTI10

NTSB accident investigation · Piper PA-28-140 · Near Bozeman, MT · January 11, 1982

Accident · Serious injuriesFinal report
Date
January 11, 1982, 07:30 local (14:30 UTC)
Place
Near Bozeman, MT
Injuries
1 serious, 1 minor
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N7273JPiper PA-28-140
Weather
Visual (VMC) · Dawn
Status
Completed · report January 11, 1983
Report
Approved by Office Director
FAA report
19820111000879A
Case key
71850

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 weatherCruise - normal
Light condition - dawnFactor
Weather condition - snowFactor
Loss of control - in flightCruise - normal
Weather condition - downdraftFactor
Weather condition - high windFactor
Terrain condition - high terrainFactor
Terrain condition - mountainous/hillyFactor
In-flight planning/decision - improperPilot in commandCause
Airspeed - not maintainedPilot in command
Stall - inadvertentPilot in command
On ground/water encounter with terrain/waterDescent - uncontrolled
Object - tree(s)
Terrain condition - snow covered

Analysis

The pilot was on an early morning flight over mountainous terrain at 8500 feet. While inbound to his destination, he encountered an area of restricted visibility with snow. As he started a right turn to correct to his desired course, his passenger alerted him of a hill ahead. At about the same time, he experienced a rapid descent. He applied full power and tried to climb, but was unable. While loosing airspeed, the aircraft pitched nose down in what the pilot described as a stall. The plane struck a tree before impacting in 4 to 5 ft of snow on a mountain slope. Both occupants survived the impact. The ELT was removed and switched from "arm" to "on." It was carried during their trek down the mountain side. The signal eventually led search aircraft to their location.

Aircraft

Registration
N7273J
Reported as
Piper PA-28-140
Category
Airplane
Serial number
2824615
Airframe hours
2,989
Engine
Lycoming O-320-23D, 150 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Operator
P. D. Sebastian
Registered owner
P. D. Sebastian
Departed
GTF · Great Falls, MT
Destination
BZN · Bozeman, 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
22
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Flight hours
85 total · 49 in this make and model · 48 as pilot in command · 24 in the last 90 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Dawn
Wind
45° at 10 knots
Visibility
2 statute miles
Lowest ceiling
10,000 ft overcast
Temperature
90 °F
Altimeter
30.00 inHg

FAA reports on this event · 1

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