ATL05CA074

NTSB accident investigation · Cessna 172H · Oakwood, GA · April 17, 2005

Accident · No injuriesData collectionFinal report
Date
April 17, 2005, 16:00 local (20:00 UTC)
Place
Oakwood, GA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N1643FCessna 172H
Weather
Visual (VMC) · Day
Status
Completed · report July 7, 2005
Report
Approved by Office Director
Parties
Atlanta FSDO
FAA report
20050417008559A
Case key
61317

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

Loss of engine power due to fuel system contamination.

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 powerCruise - normal
Fuel system,carburetor - restrictedCause
Fuel system - contamination,other than waterCause
Forced landingDescent - emergency
In flight collision with objectEmergency landing
Object - wire,transmission

Analysis

According to the pilot, after about 30-minutes of flight he felt a slight shudder in the engine which lasted for about three seconds. The engine did not lose any power and all instruments remained in the green. About 5-minutes later, with no indication or warning, the engine immediately stopped and the propeller wind milled. During the forced landing the airplane struck a power line, and landed hard on the main landing gear. Examination of the engine found the carburetor broken at its attach point on the intake manifold on the bottom of the engine. The carburetor was removed and disassembled. Examination of the carburetor float bowl found reddish/brown particles resting in the bottom of the float bowl. Additionally, flakes of the reddish/brown particles were found clogging the carburetor jet pickup. A replacement carburetor was installed on the engine and the engine was started and was run up to 1500 revolutions per minute. The engine ran for about five-minutes before being shutdown with the mixture control.

Factual narrative

On April 17, 2005, at 1600 eastern daylight time, a Cessna 172H, N1643F, registered to and operated by the private pilot, collided with a power line during a forced landing following a loss of engine power in Oakwood, Georgia. The personal flight was operated under the provisions of Title 14 CFR Part 91, and visual flight rules. Visual meteorological conditions prevailed and no flight plan was filed for the local flight. The pilot and passenger were not injured and the airplane sustained substantial damage. The flight originated from Dekalb, Georgia, on April 17, 2005 at 1400.

According to the pilot, after about 30-minutes of flight he felt a slight shudder in the engine which lasted for about three seconds. The engine did not lose any power and all instruments remained in the green. About 5-minutes later, with no indication or warning, the engine immediately stopped and the propeller wind milled. He said that he was at about 2500 feet mean sea level (MSL) and had the airplane trimmed for cruise. He immediately identified a clearing and a road to land on and started trimming the airplane for best glide. He also applied carburetor heat, and cycled the magnetos. Engine restart procedures were unsuccessful. As the pilot maneuvered the airplane for a forced landing, the airplane struck a power line, and landed on the mains hard. After the airplane came to a complete stop he and his passenger exited the airplane uninjured and a passerby called 911.

Examination of the airplane found a cut in the right wing from the leading edge to the main spar with signs of arching around the cut. The empennage was bent downward from the rear of the aft cabin, with the horizontal stabilizers resting on the ground. The airplane was recovered by Atlanta Air Recovery for further examination. On April 28, 2005, examination of the engine found the carburetor broken at its attach point on the intake manifold on the bottom of the engine. The carburetor was removed and disassembled. Examination of the carburetor float bowl found reddish/brown particles resting in the bottom of the float bowl. Additionally, flakes of the reddish/brown particles were found clogging the carburetor jet pickup. A replacement carburetor was installed on the engine and the engine was started and was run up to 1500 rpm. The engine ran for about five-minutes before being shutdown with the mixture control.

Aircraft

Registration
N1643F
Reported as
Cessna 172H
Category
Airplane
Serial number
17255038
Airframe hours
6,422.5
Engine
Continental O300, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Ryan Funk
Registered owner
Ryan Funk and Steve Rohrer
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 15, 2005 · 3.2 hours before
Departed
PDK · Dekalb, GA
Destination
PDK

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
34
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Last flight review
June 25, 2003
Seat
Left
Flight hours
201 total · 48 in this make and model · 201 as pilot in command · 2 in the last 90 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
250° at 8 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
72 °F, dew point 34 °F
Altimeter
30.29 inHg
Observed at
GVL

FAA reports on this event · 1

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