FTW03LA052

NTSB accident investigation · Shepherd Kolb Mark III · Norfork, AR · November 28, 2002

Accident · No injuriesLimited investigationFinal report
Date
November 28, 2002, 14:56 local (20:56 UTC)
Place
Norfork, AR
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N4672DShepherd Kolb Mark III
Weather
Visual (VMC)
Status
Completed · report September 30, 2003
Report
Approved by Office Director
Parties
FAA FSDO
FAA report
20021128035089A
Case key
56148

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 loss of engine power due to fuel contamination. Contributing to the accident were the trees.

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 powerTakeoff - initial climb
Fluid,fuel - contaminationCause
Fluid,fuel - water
Forced landingDescent - emergency
In flight collision with objectEmergency landing
Object - tree(s)

Analysis

Shortly after takeoff, the homebuilt experimental airplane lost power approximately 100 feet AGL. During the ensuing forced landing, and the airplane descended through trees and came to rest upright. Examination of the engine revealed water in the carburetor bowl. According to the pilot, the airplane was flown for 5 hours in the past 90 days and the fuel tank was left half full for a "long time" before being filled prior to the day of the flight. The pilot reported that he had sumped the fuel tank during pre-flight prior to the accident flight.

Factual narrative

On November 28, 2002, at 1456 central standard time, a Shepherd Kolb Mark III homebuilt experimental airplane, N4672D, registered to and operated by the pilot, was substantially damaged during a forced landing following a loss of power shortly after takeoff from a private grass airstrip near Norfork, Arkansas. The private pilot and his passenger were not injured. Visual meteorological conditions prevailed and a flight plan was not filed for the Title 14 Code of Federal Regulations Part 91 personal flight. The local flight was originating at the time of the accident.

The 350-hour pilot reported in the Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2) that, prior to take off, he refueled the airplane with 28 gallons of 93-octane automotive fuel and checked the fuel sump for signs of contamination. After a normal takeoff, the engine "quit" approximately 100 feet AGL. Subsequently, the airplane descended into a tree line and came to rest upright.

The pilot reported that the airplane sustained structural damage to the cabin section of the fuselage and the right wing. He also reported that he found water in the carburetor bowl. Upon discovering water in the carburetor bowl, the pilot drained 26 gallons of fuel from the tank and found no visible signs of water. The pilot stated that he suspected that "fuel contamination" was the reason for the loss of engine power.

The pilot further reported to an FAA inspector who responded to the site of the accident, that the airplane had been flown for 5 hours in the past 90 days and the fuel tank was left half full for a "long time" before being filled prior to the day of the flight.

Aircraft

Registration
N4672D
Reported as
Shepherd Kolb Mark III
Category
Airplane, amateur-built
Serial number
0100
Airframe hours
203
Engine
Subaru 2200, 80 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Dallas Shepherd
Airworthiness certificate
Special, Experimental (Special)
Departed
NONE · Norfork
Destination
NONE · Norfork, AR

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
69
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
350 total · 203 in this make and model · 5 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC)
Wind
180° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
57 °F, dew point 39 °F
Altimeter
30.29 inHg

FAA reports on this event · 1

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