ERA24FA221

NTSB accident investigation · Radley Vincent Quicksilver Sport 2S · Cleveland, GA · May 20, 2024

Accident · FatalClass 3 · FieldFinal report
Date
May 20, 2024, 08:42 local (12:42 UTC)
Place
Cleveland, GA · 935 Runway Circle
Injuries
1 fatal
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N960BRadley Vincent Quicksilver Sport 2S
Defining event
Takeoff: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20240520006529A
Case key
194286

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 NTSB’s determination of the probable cause, and any contributing factors.

The pilot’s failure to maintain control of the airplane during the takeoff and his exceedance of the airplane’s critical angle of attack, which resulted in an aerodynamic stall and spin at low altitude. Contributing to the accident was the pilot’s lack of experience in the accident airplane make and model.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings.

Analysis

The owner of the experimental amateur-built airplane transported it via ground to the sport pilot/light sport aircraft repairman’s facility at a grass airstrip, so that an annual condition inspection could be completed. Although the sport pilot/repairman had performed maintenance work on the airplane make and model, he had never flown one. After the sport pilot completed the inspection, he attempted a post-maintenance flight. Airport security video revealed that immediately after liftoff, the airplane turned left about 90°. The engine noise decreased, and the airplane appeared to momentarily come under control; however, it was flying toward the front of a hangar. The engine nose increased again, and the airplane cleared the hangar, but as it climbed in a left turn it encountered an aerodynamic stall, spun to the left, and impacted the ground. Postaccident examination of the wreckage revealed no evidence of any preimpact mechanical malfunctions of the airframe or engine. The airplane owner described that due to the short tail, the airplane lacked rudder effectiveness at slow airspeeds and was subject to left turning tendencies (p-factor). After viewing the video, the airplane owner further stated that it appeared the sport pilot rotated too early and over-rotated, resulting in the loss of control to the left.

Factual narrative

The factual narrative760 words

The airplane had been assembled from a kit in 2011 and was powered by a Rotax reciprocating engine driving an Aerolux three-blade ground adjustable composite propeller. The engine rotated the pusher propeller clockwise, as seen from the rear of the airplane. The current owner had purchased the airplane in December 2019. Review of the aircraft logbook revealed that the most recent annual condition inspection had been completed on May 8, 2024. At that time, the engine had accrued 29.4 hours of operation, and the airframe total time was unknown. On May 20, 2024, about 0842 eastern daylight time, an experimental amateur-built Quicksilver Sport 2S, N960B, was substantially damaged when it was involved in an accident near Cleveland, Georgia. The sport pilot was fatally injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 test flight. According to the owner of the airplane, he transported it via ground to the sport pilot/light sport aircraft repairman’s facility at Mountain Airpark (0GE5), Cleveland, Georgia. The sport pilot/repairman performed maintenance, which included replacing the fabric, replacing a throttle cable, and performing a condition inspection. The accident flight was a post maintenance test flight. Although the sport pilot owned a Zenith CH 701, he had never flown the make and model accident airplane. The owner added that due to the short tail, the accident airplane lacked rudder effectiveness at slow airspeed and was subject to left turning tendencies (p-factor). Review of airport security video revealed that the sport pilot attempted to take off on the north runway. Immediately after liftoff, the airplane turned left about 90°. The engine noise decreased, and the airplane appeared to momentarily come under control; however, it was flying toward the front of a hangar. The engine nose increased again, and the airplane cleared the hangar, but as it climbed in a left turn it abruptly descended behind the hangar and impacted the ground. After viewing the video, the airplane owner further stated that it appeared the sport pilot rotated too early and over-rotated, resulting in the loss of control to the left. An autopsy was conducted on the pilot by the Georgia Bureau of Investigation, Department of Forensic Sciences, Office of the Medical Examiner, Decatur, Georgia. The cause of death was “Generalized Blunt Force Trauma.” Toxicological testing of the pilot’s specimens was conducted by the Federal Aviation Administration Office of Forensic Sciences, Oklahoma City, Oklahoma. The results were positive for: Omerprazole and Famotidine (over-the-counter medications for gastric reflux); Atenolol, Chlorothiazide, Losartan, and Terazosin (medications for high blood pressure); Rosuvastatin (medication for high cholesterol), and Salicylic Acid (medication for pain/inflammation). None of the medications detected are considered impairing. Review of the sport pilot’s logbook revealed that he had accumulated about 900 hoursof flight time; however, there was no record of any experience in the accident airplane make and model. The airplane came to rest upright in a nose-up attitude and oriented toward the east in a grass area behind the hangar. The entirety of the airplane was accounted for at the accident site, and no debris path was observed. The empennage remained intact and was canted left. The elevator remained attached and was deflected upward. Elevator control continuity was confirmed via crushed push-pull tubes to the cockpit. The elevator trim tab remained attached to the right elevator and was in an about neutral position. Continuity of the elevator trim cable was confirmed to the cockpit. The rudder remained attached and was deflected left. The left rudder cable remained attached from the rudder to the left rudder pedal. The right rudder cable separated near the right rudder pedal and one cable end exhibited broomstraw features. Metallurgical examination revealed features of overstress and no evidence of fatigue on both cable ends. The wings remained attached, and the left wing outboard leading edge exhibited impact damage. Both ailerons remained attached to their respective wing and control cable continuity was confirmed from the ailerons to the cockpit control stick. The cockpit was crushed, but the pilot’s four-point harness remained intact. A Grand Rapids Technology Engine Information System 2000 was retained for data download; however, the display screen was blank when powered on. A plastic fuel tank was mounted above the cockpit. It remained intact with its fuel cap secured and contained about ¼-tank of automotive gasoline. When the propeller was moved by hand, continuity of the powertrain was confirmed throughout the engine. All three propeller blades remained attached to the hub. Two blades were undamaged, and one was separated near the root, consistent with contact with the crushed tubular frame.

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident.

Aircraft

Registration
N960B
Reported as
Radley Vincent Quicksilver Sport 2S (NO SERIES)
Category
Airplane, amateur-built
Serial number
0249
Built
2011
Engine
Rotax 582, 64 horsepower, reciprocating
Damage
Substantial damage
Flight
Flight test · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · May 8, 2024
Airport
0GE5 · Mountain Airpark, runway N, 2,500 × 130 ft, grass/turf
Equipment
Airframe parachute

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
79
Injuries
Fatal
Certificate
Sport Pilot
Airplane ratings
Single-engine land
Medical
Sport pilot
Last flight review
October 21, 2022
Seat
Left
Restraint
4-point
Toxicology
Performed
Flight hours
906 total · 0 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
110° at 3 knots
Visibility
7 statute miles
Lowest ceiling
2,600 ft overcast
Temperature
66 °F, dew point 59 °F
Altimeter
30.06 inHg
Observed at
AJR, 12 nm away
METAR
KAJR 201255Z AUTO 11003KT 7SM OVC026 19/15 A3006

Docket · 12

The files NTSB released with the investigation on January 14, 2025, on NTSB’s docket system: statements, records, photos and specialists’ reports. 17.1 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.