ERA11LA028

NTSB accident investigation · Brown Thomas E Thorp T-18 · Lake Como, FL · July 19, 2009

Accident · Minor injuriesLimited investigationFinal report
Date
July 19, 2009, 12:00 local (16:00 UTC)
Place
Lake Como, FL
Injuries
1 minor, 1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N33TBBrown Thomas E Thorp T-18
Defining event
Landing-landing roll: Runway excursion
Weather
Visual (VMC) · Day
Status
Completed · report April 12, 2011
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20090719857299A
Case key
77632

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The pilot's delayed decision to execute a go-around while landing with variable wind, which resulted in a runway overrun.

Findings · 3

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.

Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Effect on equipmentBrown Thomas E THORP T-18: 1 caseAll aircraft: 594 cases
Object/animal/substance: fence/fence postEnvironmental issues › Physical environment · Effect on equipmentBrown Thomas E THORP T-18: 1 caseAll aircraft: 313 cases

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

According to the pilot, as the airplane was landing the wind shifted from a headwind to a tailwind. He elected not to perform a go-around due to power lines and trees located at the end of the runway. The airplane departed the end of the runway and struck fence posts with both wings. The pilot stated that an earlier decision to go around would have prevented this accident. He further reported that there were no preimpact mechanical malfunctions or failures of the airplane. A review of recorded surface observations at airports within an approximate 50-mile radius of the airport revealed that the wind direction was variable from the west to the southeast. Some airports recorded thunderstorm and rain showers in their respective vicinity, indicating frontal passage in the area of the accident airport around the time of the accident.

Factual narrative

On July 19, 2009, approximately 1200 eastern daylight time, an experimental amateur-built Brown Thorp T-18, N33TB, was substantially damaged when it impacted fence posts after landing at Thunderbird Air Park (2FA5), Lake Como, Florida. Visual meteorological conditions prevailed around the time of the accident and no flight plan was filed. The certificated commercial pilot was not injured and the passenger suffered minor injuries. The personal local flight was conducted under the provisions of Title 14 Code of Federal Regulations Part 91. In an interview with a Federal Aviation Administration (FAA) inspector, the passenger reported that the pilot attempted to land "at a high rate of speed." The airplane departed the end of the runway and impacted fence posts with both wings. Photographs provided by the passenger to the FAA revealed buckling and twisting of both wings. In an interview with an FAA inspector, the pilot stated that the winds were variable at the time of the accident, he observed the airport's wind sock and attempted to land with a headwind. During the landing the wind shifted from a headwind to a tailwind and the airplane departed the end of the runway. In a written statement to the National Transportation Safety Board (NTSB) the pilot reported that when the wind shifted to a tailwind, a go-around would not have been possible "due to the rising terrain and power lines at the departure end." He further stated that "an earlier decision to go around would have prevented this accident." The pilot reported that there was no mechanical malfunction or failures with the airplane. According to the pilot and FAA records, the pilot, age 65, held a commercial pilot and certificated flight instructor certificates with ratings for airplane single-engine land, multiengine land, and instrument airplane. His most recent FAA second-class medical certificate was issued on October 1, 2008. He reported 5,025 total hours of flight experience and 300 total hours of flight experience in the accident airplane make and model. According to FAA records, the airplane was constructed from a kit in 1981 and was issued a special airworthiness certificate on June 17, 1988. The airplane was registered to the accident pilot/owner on May 2, 2001. According to the pilot, it was equipped with a Lycoming O-360-A4K engine and the airplane had accrued 640 flight hours at the time of the accident. The 1145 recorded weather observation at Ormond Beach Municipal Airport (OMN), Ormond Beach, Florida, located approximately 26 miles to the southeast of the accident location, included winds from 110 degrees at 8 knots, visibility 8 miles, few clouds at 2,000 feet, temperature 29 degrees C, dew point 20 degrees C; altimeter 30.08 inches of mercury. In a review of airports within an approximate 50 mile radius of the accident airport, with weather recording equipment, revealed that the winds were variable in direction from the west to the southeast. Airports located to the south andsoutheast of the accident airport recorded thunderstorm activity within their vicinity around the time of the accident. The airport was a private use airport with a single turf runway designated as runway 4/22. The runway was 2,870-feet-long by 80-feet-wide and was noted as having trees 100 feet from both ends of the runway. The NTSB was notified of the accident on October 21, 2010.

Aircraft

Registration
N33TB
Reported as
Brown Thomas E Thorp T-18
Category
Airplane, amateur-built
Serial number
915
Airframe hours
640
Engine
Lycoming O-360-A4K, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · July 7, 2010
Departed
13FA · Hastings, FL
Destination
2FA5 · Lake Como, FL
Airport
2FA5 · Thunderbird Air Park, runway 32, 2,870 × 80 ft, grass/turf

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
65
Injuries
None
Certificates
Flight instructor, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
April 28, 2009
Seat
Left
Flight hours
5,025 total · 300 in this make and model · 4,600 as pilot in command · 55 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
110° at 8 knots
Visibility
8 statute miles
Lowest ceiling
None
Temperature
84 °F, dew point 68 °F
Altimeter
30.07 inHg
Observed at
OMN, 26 nm away

Docket · 5

The files NTSB released with the investigation on December 15, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.3 MB in all.

FAA reports on this event · 1

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