ATL99LA030

NTSB accident investigation · Michael L. Thibault RV-4 · Okeechobee, FL · December 6, 1998

Accident · No injuriesLimited investigationFinal report
Date
December 6, 1998, 16:01 local (21:01 UTC)
Place
Okeechobee, FL
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N62632Michael L. Thibault RV-4
Weather
Visual (VMC) · Day
Status
Completed · report February 16, 2001
Report
Approved by Office Director
FAA report
19981206032799A
Case key
45406

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 failure to use carburetor heat that resulted in the total loss of engine power. Factors were conditions favorable for the formation of carburetor ice.

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) - nonmechanicalClimb - to cruise
Weather condition - carburetor icing conditionsFactor
Carburetor heat - not usedPilot in commandCause
Fuel system - iceFactor
Forced landingDescent - emergency
In flight collision with objectEmergency descent/landing
Object - other

Analysis

While on final approach to runway 13, the pilot experienced a complete loss of engine power. The pilot elected to attempt an emergency landing on a public street. During the emergency landing, the right wing collided with a mailbox and a parked van. The post-accident examination of the accident site disclosed that the airplane rested in a ditch adjacent to the public street. The examination of the airplane revealed that fuel was present in the fuel system. Examination of the ignition system disclosed that the spark plugs displayed a clean ignition pattern. No obvious mechanical problems with the airplane were observed during the field examination. Weather conditions were favorable for the formation of carburetor ice, and the pilot did not report applying carburetor heat during any phase of the flight.

Factual narrative

On December 6, 1998, at 1601 eastern standard time, a Michael L. Thibault, RV-4, N62632, an experimental airplane, registered to the pilot, collided with a mailbox during an emergency landing near the Okeechobe Airport in Okeechobee, Florida. The personal flight was operated by the pilot under the provisions of Title 14 CFR Part 91 with no flight plan filed. A review of weather data recovered from the nearest reporting facility disclosed that visual weather conditions prevailed at the time of the accident. The airplane sustained substantial airframe damage, and the commercial pilot was not injured. The flight initially departed Okeechobee, Florida, at 1430.

According to the pilot, on the morning of the accident he completed a preflight inspection of the airplane. After takeoff, the pilot flew 30 minutes in the local flying area before returning to the airport for closed traffic. The pilot reported that he had made several touch and go landings at Okeechobee Airport. While on final approach to runway 13, the pilot experienced a complete loss of engine power. The pilot elected to attempt an emergency landing on a public street. During the emergency landing, the right wing collided with a mailbox and a parked van.

The post-accident examination of the accident site disclosed that the airplane rested in a ditch adjacent to the public street. The examination of the airplane revealed that fuel was present in the fuel system. Examination of the ignition system disclosed that the spark plugs displayed a clean ignition pattern. No obvious mechanical problems with the airplane were observed during the field examination.

A review of existing weather data disclosed that weather conditions were favorable for the formation of carburetor ice. The pilot did not report applying carburetor heat during any phase of the flight.

Aircraft

Registration
N62632
Reported as
Michael L. Thibault RV-4
Category
Airplane, amateur-built
Serial number
1733
Airframe hours
3
Engine
Lycoming O-360-FA16, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Michael L. Thibault
Airworthiness certificate
Special, Experimental (Special)
Airport
OBE · Okeechobee County, runway 13, 4,000 × 150 ft, asphalt

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
56
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Center
Flight hours
2,000 total · 2 in this make and model · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
120° at 8 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
77 °F, dew point 61 °F
Altimeter
30.00 inHg
Observed at
FPR, 30 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.

Other investigations on N62632 · 1

Matched to the same aircraft by N-number and date.