CHI08CA079

NTSB accident investigation · Cessna 172RG · Litchfield, IL · February 8, 2008

Accident · No injuriesData collectionFinal report
Date
February 8, 2008, 12:05 local (18:05 UTC)
Place
Litchfield, IL
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N4726VCessna 172RG
Defining event
Maneuvering-low-alt flying: Low altitude operation/event
Weather
Visual (VMC) · Day
Status
Completed · report March 31, 2008
Report
Approved by Office Director
Parties
Federal Aviation Administration - Springfield FSDO
FAA report
20080208857779A
Case key
67680

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 intentional low altitude flight and his failure to maintain clearance from the static wire. Contributing to the accident were the static wire, the partial loss of engine power due to propeller vibration, and the muddy field in which the forced landing was made.

Findings · 5

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parameters: altitudeAircraft › Aircraft oper/perf/capability · Incorrect use/operationCessna 172RG: 1 caseAll aircraft: 1,310 casesProbable cause
Object/animal/substance: wireEnvironmental issues › Physical environment · Not specifiedCessna 172RG: 1 caseAll aircraft: 588 casesProbable cause
AircraftAircraft › Aircraft power plant · Not specifiedCessna 172RG: 1 caseAll aircraft: 151 casesProbable cause
Runway/land/takeoff/taxi surfaceEnvironmental issues › Physical environment · Not specifiedCessna 172RG: 1 caseAll aircraft: 253 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot reported that he did not observe any obstacles when he overflew the lake, but noted there was some bird activity in the vicinity. He performed a low altitude pass, approximately 100 feet above the lake, without incident. During a second low altitude pass, the pilot heard a "thump" noise which was immediately followed by a loss of engine power and engine vibration. A forced landing was made in a nearby muddy field, but the airplane nosed over shortly after touchdown. The airplane impacted a static wire that was strung across the lake. The wire, approximately 40 feet above the water, was part of two-wire power transmission line. The airplane's propeller had damage consistent with a wire strike.

Factual narrative

The pilot reported that he did not observe any obstacles when he overflew the lake, but noted there was some bird activity in the vicinity. He performed a low altitude pass, approximately 100 feet above the lake, without incident. During a second low altitude pass, the pilot heard a "thump" noise which was immediately followed by a loss of engine power and engine vibration. A forced landing was made in a nearby muddy field, but the airplane nosed over shortly after touchdown. The airplane impacted a static wire that was strung across the lake. The wire, approximately 40 feet above the water, was part of two-wire power transmission line. The airplane's propeller had damage consistent with a wire strike.

Aircraft

Registration
N4726V
Reported as
Cessna 172RG
Category
Airplane
Serial number
172RG0370
Airframe hours
9,768
Engine
Lycoming O-360, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Langa Aircraft Resources, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · January 1, 2008
Departed
ALN · East Alton, IL
Destination
ALN · Litchfield, IL

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
19
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Seat
Left
Flight hours
175 total · 18 in this make and model · 142 as pilot in command · 21 in the last 90 days · 11 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
190° at 16 knots
Visibility
10 statute miles
Lowest ceiling
20,000 ft broken
Temperature
45 °F, dew point 32 °F
Altimeter
29.87 inHg
Observed at
ALN, 34 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.