CEN24LA006

NTSB accident investigation · Gyro Technic GT-VX2 · Saint Peter, MN · October 8, 2023

Accident · FatalClass 3 · LimitedFinal report
Date
October 8, 2023, 15:52 local (20:52 UTC)
Place
Saint Peter, MN · Riverbank
Injuries
1 fatal
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N557LJGyro Technic GT-VX2
Defining event
Maneuvering-low-alt flying: Low altitude operation/event
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Central Region
Parties
FAA
FAA report
20231008016159A
Case key
193213

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 clearance from power lines during low-level maneuvering through a river valley.

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.

Performance/control parameters: altitudeAircraft › Aircraft oper/perf/capability · Not attained/maintainedLoren D Jones GYRO TECHNIC VX2: 1 caseAll aircraft: 1,310 casesProbable cause
Object/animal/substance: wireEnvironmental issues › Physical environment · Awareness of conditionLoren D Jones GYRO TECHNIC VX2: 1 caseAll aircraft: 588 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

The pilot was conducting a personal flight as part of a flight of two gyroplanes. Bothpilots were flying their gyroplanes at low level through a river valley when the accident occurred. As they approached a bridge, the second pilot climbed his gyroplane; however, the accident pilot remained at a lower altitude after passing over the bridge and subsequently impacted power lines. The second pilot noticed “flashing” below him and observed the accident gyroplane splash into the river. The gyroplane sustained substantial damage and the pilot was fatally injured. A witness on the ground observed the gyroplane fly directly into the power lines. Postaccident examination of the airframe and engine revealed no anomalies that would have precluded normal operation.

Factual narrative

On October 8, 2023, about 1552 central daylight time, an experimental Gyro Technic GT-VX2 gyroplane, N557LJ, was substantially damaged when it was involved in an accident near Saint Peter, Minnesota. The pilot was fatally injured. The gyroplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot departed from Mankato Regional Airport (MKT), Mankato, Minnesota, about 1500 as a flight of two gyroplanes. Both gyroplanes flew to Le Sueur Municipal Airport (12Y), Le Sueur, Minnesota, and completed multiple landings in the traffic pattern. The second pilot reported that after leaving 12Y, the two gyroplanes followed a river valley at low level. As both gyroplanes approached a bridge, the second pilot climbed to a higher altitude; however, the accident pilot remained at a lower altitude after passing over the bridge. The second pilot noticed “flashing” below him and observed the accident gyroplane splash into the river. A witness on the ground reported observing the accident gyroplane fly directly into power lines, flip upside down, and fall inverted into the river. During a postaccident examination of the airframe, flight control continuity was established from the control yoke to all flight controls. The rudder cables were continuous from the cockpit pedals to the control surface. No preimpact anomalies were found with the flight control system. A postaccident examination of the engine revealed no preimpact anomalies that would have precluded normal operation. The gyroplane was equipped with an engine control unit (ECU) capable of logging data. The entire 1.06-hour accident flight was recorded, and no pre-impact anomalies were found within the ECU data. According to the Mayo Clinic Laboratories autopsy report, the pilot's cause of death was "multiple blunt impact injuries," and the manner of death was "accident." The Federal Aviation Administration's Forensic Sciences Laboratory toxicology tests were negative for all tests performed.

Aircraft

Registration
N557LJ
Reported as
Gyro Technic GT-VX2
Category
Helicopter, amateur-built
Serial number
VX2-002
Built
2023
Airframe hours
0
Engine
Rotax 912 IS, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · July 7, 2023
Departed
12Y · Le Sueur, MN
Destination
MKT · Mankato, MN
Airport
MKT · Mankato Rgnl
Equipment
Electronic primary flight display, Electronic multifunction display

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
66
Injuries
Fatal
Certificates
Flight instructor, Private, Commercial, Remote, Airline transport
Airplane ratings
Single-engine sea, Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
July 12, 2023
Seat
Center
Restraint
4-point
Toxicology
Performed
Flight hours
10,392 total · 1 in this make and model · 510.8 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
20° at 9 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point 36 °F
Altimeter
29.93 inHg
Observed at
KMKT, 6 nm away
METAR
KMKT 082050Z AUTO 02009KT 10SM SCT075 16/02 A2993 RMK T01600020 MADISHF,M

Docket · 9

The files NTSB released with the investigation on February 20, 2025, on NTSB’s docket system: statements, records, photos and specialists’ reports. 7.2 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.