MKC89LA193

NTSB accident investigation · Piper PA-28-161 · Chanhassen, MN · September 5, 1989

Accident · No injuriesLimited investigationFinal report
Date
September 4, 1989, 21:15 local (Sep 5, 1989, 02:15 UTC)
Place
Chanhassen, MN
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N8068CPiper PA-28-161
Weather
Visual (VMC) · Night/dark
Status
Completed · report October 24, 1990
Report
Approved by Office Director
FAA report
19890904033579A
Case key
34860

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

Engine assembly dowell pin sheared causing total powerplant failure and inadequate visual lookout by the driver of the ground vehicle.

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(total) - mech failure/malfCruise
Engine assembly,other - shearedCause
Powerplant - failure,totalCause
Emergency procedure - performedPilot in command
Forced landingDescent - emergency
On ground/water collision with objectStanding
Evacuation - not performedPilot in command
Object - vehicle
Visual lookout - inadequateDriver of vehicleCause

Analysis

While on a night, cross country flight, the pilot said that the engine failed. The pilot was able to make an emergency landing on a highway without damage to the aircraft. While the pilot and passengers were in the fully stopped aircraft, it was struck by a motor vehicle, damaging the left wing. Post accident investigation revealed a rear crankshaft dowell pin had sheared, causing all rear engine driven accessories and the camshaft to cease operation, resulting in powerplant failure.

Aircraft

Registration
N8068C
Reported as
Piper PA-28-161
Category
Airplane
Serial number
28-8216099
Airframe hours
2,370
Engine
Lycoming O-320-D3G, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Thunderbird Aircraft Co.
Registered owner
Thunderbird Aviation Inc
Airworthiness certificate
Standard, Normal; Standard, Utility
Last inspection
Annual · August 5, 1989 · 50 hours before
Departed
STC · St. Cloud, MN
Destination
Y12 · Lakeville, MN

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
35
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
140 total · 60 in this make and model · 90 as pilot in command · 90 in the last 90 days · 75 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Night/dark
Wind
200° at 5 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
70 °F, dew point -0 °F
Altimeter
30.00 inHg
Observed at
FCM, 5 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.