FTW02LA180

NTSB accident investigation · Frennance Twinstar · Bastrop, LA · June 14, 2002

Accident · Serious injuriesLimited investigationFinal report
Date
June 13, 2002, 20:15 local (Jun 14, 2002, 01:15 UTC)
Place
Bastrop, LA
Injuries
2 serious
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N711FSFrennance Twinstar
Weather
Visual (VMC) · Dusk
Status
Completed · report December 6, 2002
Report
Approved by Office Director
Parties
Federal Aviation Administartion (FSDO)
FAA report
20020613015059A
Case key
54936

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 failure to maintain altitude for an undetermined reason, which resulted in an in-flight collision with 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.

In flight collision with objectManeuvering
Altitude - not maintainedPilot in commandCause
Object - tree(s)
Lack of total experience in type of aircraftPilot in command

Analysis

While returning to the airport, the gyroplane started losing altitude and impacted trees approximately 1/2 mile from the airport's only runway. The pilot reported that due to a concussion, he does not recall the events surrounding the accident. The passenger reported that he recalled that they flew over town, were en route back to the airport, and could see the airport when the gyroplane started to lose altitude. As the gyroplane neared the trees, he heard the engine noise increase. Subsequently, the gyroplane impacted trees and came to rest upright. The passenger added that as he exited the gyroplane, fuel was leaking on him. A witness heard the engine at full throttle, heard the rotor blades impact trees, and then the engine noise stopped; however, the witness did not make visual contact with the gyroplane. The pilot held an airline transport certificate, a commercial pilot certificate, and a flight instructor certificate with various airplane ratings; however, he did not hold a rotorcraft-gyroplane category and class rating. The pilot was unaware that he was required to obtain this category and class rating. At the time of the accident, the pilot had accumulated a total of 3.0 hours in gyroplanes.

Factual narrative

On June 13, 2002, at 2015 central daylight time, a Frennace Twinstar gyroplane, N711FS, was destroyed when it impacted trees while maneuvering near the Morehouse Memorial Airport, Bastrop, Louisiana. The gyroplane was registered to and operated by the pilot. The airline transport rated pilot and his non-pilot rated passenger sustained serious injuries. Visual meteorological conditions prevailed, and a flight plan was not filed for the 14 Code of Federal Regulations Part 91 personal flight. The local flight originated from the Morehouse Memorial Airport, at 1945.

The pilot reported that he departed Bastrop for a local VFR flight. Due to a concussion, he does not recall the events surrounding the accident. The passenger reported that he recalled departing from the airport and flying over the town of Bastrop. They were en route back to Bastrop, and he could see the airport when the gyroplane started to lose altitude. As the gyroplane neared the trees, he heard the engine noise increase. Subsequently, the gyroplane impacted trees and came to a stop upright 1/2 mile west of, and abeam, the approach end of runway 34. The passenger added that as he exited the gyroplane, fuel was leaking on him. According to the pilot, the gyroplane sustained structural damage to the fuselage, rotor blades and rotor mast.

According to a witness, the flight departed Morehouse Memorial Airport to the east, turned to the north, and traveled out of sight. At 2015, while talking on a mobile phone, the witness heard the engine at full throttle, heard the rotor blades impact trees, and then the engine noise stopped. The witness did not visually observe the accident.

The pilot held an airline transport certificate, commercial pilot certificate, and a flight instructor certificate for airplanes; however, he did not hold a rotorcraft-gyroplane rating. The pilot was unaware that he was required to obtain this category and class rating. At the time of the accident, the pilot had accumulated a total of 9,046 hours, of which 3.0 hours were in gyroplanes.

At 1953, the surface weather observation facility at the Monroe Regional Airport (KMLU), located 20 miles southwest of Morehouse, reported the following conditions: wind from 350 degrees at 9 knots, visibility 10 statute miles, a scattered cloud layer at 6,000 feet, broken cloud layers at 7,500 and 9,000 feet, temperature 28 degrees Celsius, dew point 22 degrees Celsius, altimeter 29.84 inches of Mercury, a wind shift to 010 degrees at 33 minutes past the hour, and lightning in the distant north.

Aircraft

Registration
N711FS
Reported as
Frennance Twinstar
Category
Gyroplane, amateur-built
Serial number
TS-103
Airframe hours
60
Engine
Lycoming O-320-B1A, 160 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Registered owner
James M. Brown
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · April 21, 2002 · 3 hours before
Departed
2F8 · Bastrop, LA
Airport
2F8 · Morehouse Memorial, runway 34, 4,000 × 100 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
35
Injuries
Serious
Certificates
Flight engineer, Flight instructor, Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Last flight review
August 29, 2001
Seat
Front
Flight hours
9,046 total · 3 in this make and model · 1,516 as pilot in command · 52 in the last 90 days

Weather

Conditions
Visual (VMC) · Dusk
Wind
270° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
88 °F, dew point 70 °F
Altimeter
29.82 inHg
Observed at
MLU, 17 nm away

Docket · 3

The files NTSB released with the investigation on October 24, 2002, on NTSB’s docket system: statements, records, photos and specialists’ reports. 486 KB 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.