CEN24FA346

NTSB accident investigation · Sonex Sonex · Sulphur Springs, IN · September 10, 2024

Accident · FatalClass 3 · FieldFinal report
Date
September 10, 2024, 13:45 local (17:45 UTC)
Place
Sulphur Springs, IN · PVT grass airstrip - inverted in soybean field - departed to the right during takeoff
Injuries
1 fatal
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N966DPSonex Sonex
Defining event
Takeoff: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Central Region
Parties
FAA Indianapolis FSDO
FAA report
20240910012849A
Case key
195094

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 loss of directional control during takeoff for undetermined reasons.

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: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedDave Province SONEX: 1 caseAll aircraft: 3,958 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotDave Province SONEX: 1 caseAll aircraft: 9,295 casesProbable cause
Not determinedNot determined › Not determined · Unknown/Not determinedDave Province SONEX: 1 caseAll aircraft: 2,247 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

A witness reported that the pilot stated that he was going to conduct a short local flight. The pilot, who hangared the airplane at his residence, taxied the airplane from his residence to the private grass airstrip. The witness observed the pilot perform an engine run-up and then proceed to take off. Due to terrain obscuration, the witness lost sight of the airplane shortly after the initial takeoff roll. The witness did not see the airplane become airborne. She then observed the airplane inverted in an adjacent soybean field. She responded to the site, extricated the pilot, and rendered aid until first responders arrived. The airplane sustained substantial damage to the vertical stabilizer and rudder. Examination of the airframe and engine revealed no mechanical failures or malfunctions that would have precluded normal operation. An acquaintance of the pilot stated that it was not uncommon for deer to be grazing in the soybean fields and cross the airstrip; however, there was no evidence of the airplane colliding with wildlife on the runway. The reason for the loss of directional control during the takeoff could not be determined.

Factual narrative

The privately-owned grass airstrip was located between two large soybean fields. An acquaintance of the pilot stated that it was not uncommon for deer to be grazing in the soybean fields and cross the airstrip. On September 10, 2024, about 1345 eastern daylight time, a Sonex airplane, N966DP, sustained substantial damage when it was involved in an accident near Sulphur Springs, Indiana. The pilot sustained fatal injuries. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. According to a witness, the pilot stated he was going to conduct a short local flight. The pilot, who hangared the airplane at his residence, taxied the airplane from his residence to the private grass airstrip. The witness observed the pilot perform an engine run-up, and then proceed to take off. Due to terrain obscuration, the witness lost sight of the airplane shortly after the initial takeoff roll. The witness observed a dust cloud and had not realized the airplane had crashed. The witness, who did not observe the airplane become airborne, responded to the grass airstrip and observed the airplane inverted in an adjacent soybean field (see Figure 1). The witness extricated the pilot and rendered aid until first responders arrived. Figure 1. Aerial views of the accident site. The airplane came to rest inverted in a soybean field about 1,250 ft from the start of the takeoff roll (see Figure 2.). Figure 2. Accident airplane as it came to rest inverted in soybean field. An autopsy of the pilot was performed by Saguaro Forensic Consulting Firm, LLC, at the request of the Henry County Coroner’s Office. The autopsy report was reviewed by the National Transportation Safety Board Investigator-In-Charge. According to the autopsy report, the cause of death was multiple blunt force injuries, and the manner of death was accident. Toxicology testing performed at the FAA Forensic Sciences Laboratory found Clopidogrel, Doxazosin, Naproxen, and Pantoprazole in the pilot’s blood and liver. Clopidogrel (Plavix) is a platelet aggregation inhibitor used to prevent blood clots in coronary artery stents. Doxazosin (Cardura) is an alpha-1-adrenergic blocker used to treat prostate hypertrophy and high blood pressure. Naproxen (Aleve) is a non-prescription NSAID used to treat pain and inflammation. Pantoprazole (Protonix) is a proton-pump inhibitor that inhibits secretion of stomach acid. The medication is used to treat certain esophagus and stomach conditions such as acid reflux. All of the medications detected are acceptable for use by pilots and none were impairing or would have adversely affected performance. A review of the pilot’s logbook revealed the pilot had completed 4 flights in the accident airplane for a total of 4.0 flight hours since he purchased the airplane in 2021. The pilot’s most recent flight in the accident airplane was August 14, 2023, about 13 months before the accident. Postaccident examination of the airplane revealed the airplanesustained substantial damage to the vertical stabilizer and rudder. Flight control continuity was confirmed from the cockpit controls to the flight control surfaces. The flaps were in the retracted position. The canopy was found locked and secured. The main wheel brake handle was found in the OFF position. The wheel brakes engaged when the handle was manually moved to the ON position. After the airplane was recovered to the pilot’s hangar, the engine was functionally tested on the airframe at various throttle settings with no anomalies noted. Multiple throttle bursts were completed with no hesitation or anomalies noted. The electric fuel pump was placed in the ON position while in the idle and ¾ throttle positions; no change in engine performance was noted. Postaccident examination of the airplane revealed no evidence of any preimpact mechanical malfunctions or failures that would have precluded normal operation.

Aircraft

Registration
N966DP
Reported as
Sonex Sonex
Category
Airplane, amateur-built
Serial number
1006
Built
2021
Airframe hours
10.7
Engine
Aerovee 2180, 80 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · August 11, 2023 · 1.1 hours before
Airport
39IN · Roberts Field, runway 30, 4,000 × 100 ft, grass/turf
Equipment
None

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
82
Injuries
Fatal
Certificate
Private
Airplane ratings
Single-engine land
Medical
Sport pilot
Last flight review
July 25, 2020
Seat
Left
Restraint
4-point
Toxicology
Performed
Flight hours
890 total · 4 in this make and model · 0 in the last 90 days · 0 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 6 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point 52 °F
Altimeter
30.16 inHg
Observed at
KMIE, 14 nm away
METAR
KMIE 101753Z 18006KT 10SM CLR 27/11 A3016 RMK AO2 SLP204 T02720111 10278 20111 58011

Docket · 5

The files NTSB released with the investigation on April 24, 2025, on NTSB’s docket system: statements, records, photos and specialists’ reports. 9.1 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.