SEA97LA036

NTSB accident investigation · Piper PA18-135 · Cohagen, MT · December 5, 1996

Accident · FatalLimited investigationFinal report
Date
December 5, 1996, 15:00 local (22:00 UTC)
Place
Cohagen, MT
Injuries
2 fatal
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N62100Piper PA18-135
Weather
Visual (VMC) · Day
Status
Completed · report March 31, 1998
Report
Approved by Office Director
FAA report
19961205037559A
Case key
42546

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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Probable cause

The pilot's failure to maintain airspeed. Factors were the intentional flight at a low altitude and the over gross condition of the airplane.

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 collision with terrain/waterManeuvering
Airspeed - not maintainedPilot in commandCause
Low altitude flight/maneuver - intentionalPilot in commandFactor
Aircraft weight and balance - exceededPilot in commandFactor

Analysis

The airplane had departed from a road near the pilot's ranch to survey animals and possibly shoot coyotes. The wreckage was found seven days later. The airplane ground scars and wreckage were within an area of about 65 feet.

Factual narrative

On December 5, 1996, approximately 1500 hours mountain standard time, a Piper PA-18-135, N62100, being flown by a private pilot, sustained substantial damage during a collision with terrain near Cohagen, Montana. The pilot and the only passenger received fatal injuries. Visual meteorological conditions existed in the area and no flight plan had been filed. The flight had originated from a road on the pilot's ranch about 1430.

The purpose of the flight was to survey animals and possibly shoot coyotes. When the flight did not return, family members contacted local authorities who initiated a search for the airplane. The wreckage was located about 12 miles south of Cohagen, by a snowmobile, on December 12, 1996. The airplane was equipped with "tundra" tires.

The airplane wreckage was examined on December 13 by the FAA and representatives from the New Piper Aircraft Company and Textron Lycoming. The first evidence of ground impact was a ground scar with red glass at the scar. About 9 feet beyond this point was the propeller. The main wreckage was about 65 feet from the initial ground scar and was extensively burned. The engine was rotated and compression observed in the cylinders. The accessories were not checked due to fire damage. One propeller blade had an aft bend, chordwise abrasions and chordwise scratching. The other blade was relatively straight with only light damage. Control continuity was established for the flight controls. The flaps were retracted.

Actual gross weight of the aircraft was not determined. However, using estimated weights of 170 pounds for the pilot, 280 pounds for the passenger, 15 pounds for oil and 20 pounds for baggage, the airplane would have been about 4 pounds over gross without any fuel on board.

Aircraft

Registration
N62100
Reported as
Piper PA18-135
Category
Airplane
Serial number
18-3934
Airframe hours
3,450
Engine
Lycoming O-290-D2, 135 horsepower, reciprocating
Damage
Substantial damage
Fire
On-Ground
Flight
Business · Part 91
Registered owner
Charles C. Murnion
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 1, 1996
Departed
Jordan, 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
43
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Front
Flight hours
502 total

Weather

Conditions
Visual (VMC) · Day
Wind
285° at 12 knots
Visibility
30 statute miles
Lowest ceiling
11,000 ft broken
Temperature
37 °F, dew point 28 °F
Altimeter
29.00 inHg
Observed at
MLS, 55 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.