SEA89LA049

NTSB accident investigation · Piper PA28-140 · Beaver Marsh, OR · February 15, 1989

Accident · No injuriesLimited investigationFinal report
Date
February 15, 1989, 12:20 local (20:20 UTC)
Place
Beaver Marsh, OR
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N95286Piper PA28-140
Weather
Visual (VMC) · Day
Status
Completed · report September 28, 1990
Report
Approved by Office Director
FAA report
19890215063039A
Case key
40981

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

An loss of engine power due to a failed exhaust valve. Contributing to the accident was the snow covered terrain on which a precautionary landing was made.

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 engine power(partial) - mech failure/malfCruise - normal
Engine assembly,valve,exhaust - failure,totalCause
Forced landingDescent - emergency
Nose overLanding - roll
Terrain condition - mountainous/hillyFactor
Terrain condition - runway
Terrain condition - snow coveredFactor

Analysis

During cruise flt, the eng misfired and began operating on 3 cylinders. Due to rough terrain btw himself and a known suitable airport, the plt elected to make a precautionary landing at a small snow-covered airstrip. The acft nosed over on landing in 4 ft of snow. Inspection of the engine revealed the #3 cylinder exhaust valve had failed.

Aircraft

Registration
N95286
Reported as
Piper PA28-140
Category
Airplane
Serial number
28-25876
Engine
Lycoming O-320-E2A, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Wallace W. St. Clair
Airworthiness certificate
Standard, Utility; Standard, Normal
Departed
S07 · Bend, OR
Destination
031 · Healdsburg, CA
Airport
2S2 · Beaver Marsh State, runway 18, 4,500 × 60 ft, dirt

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
38
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
751 total · 730 in this make and model · 690 as pilot in command · 29 in the last 90 days · 29 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 10 knots
Visibility
45 statute miles
Lowest ceiling
20,000 ft overcast
Temperature
32 °F, dew point 18 °F
Altimeter
30.00 inHg
Observed at
RDM, 65 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.