ERA22LA134

NTSB accident investigation · Spangenberg AR-1KC · Sarasota, FL · February 20, 2022

Accident · Minor injuriesClass 3 · LimitedFinal report
Date
February 20, 2022, 14:45 local (19:45 UTC)
Place
Sarasota, FL · On Airport
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N65PCSpangenberg AR-1KC
Defining event
Takeoff-rejected takeoff: Loss of control on ground
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
20220220002379A
Case key
104693

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

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Probable cause

The pilot’s improper control input during an aborted takeoff procedure, which resulted in a main rotor blade contacting the vertical stabilizer, a loss of control, and subsequent runway excursion.

Findings · 2

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: pitch controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedPaul D Spangenberg AR-1KC: 1 caseAll aircraft: 526 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

The pilot stated that, during the takeoff roll, she felt a “shudder” just before the gyrocopter became airborne. She immediately aborted the takeoff and reduced power with the aft cyclic still applied. The gyrocopter entered a steep nose-high attitude, and a main rotor blade struck the top of the vertical stabilizer. The gyrocopter departed the left side of the runway and landed hard, which resulted in substantial damage to the rudder. Also, the nosewheel fractured and separated from the airframe. Postaccident examination of the flight controls and the fractured nosewheel revealed no preimpact mechanical anomalies that would have precluded normal operation.

Factual narrative

On February 20, 2022, an experimental amateur-built Spangenberg AR-1KC gyrocopter, N65PC, was substantially damaged when it was involved in an accident at Sarasota Bradenton International Airport (SRQ), Sarasota, Florida. The pilot sustained minor injuries. The gyrocopter was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot stated that, during the takeoff roll as the rotors reached 180 rpm, she released the pre-rotator and increased speed for a normal takeoff. Just before becoming airborne, the gyrocopter and the control stick “began to shudder.” The pilot also stated that she immediately aborted the takeoff and pulled back engine power. According to the pilot, she had the control stick “back too far for the conditions at that moment,” which caused a nose-high attitude and a rotor blade to “hit the very top of the tail on two screw heads that held the top of the rudder in place.” The gyrocopter departed the left side of the runway and landed hard, which resulted in substantial damage to the rudder. The pilot reported that she and her flight instructor examined the flight controls after the accident and found no mechanical problems that would have contributed to the accident. The nose wheel separated from the gyrocopter at the weld point where it attached to the airframe. Metallurgical examination of the fracture surfaces revealed that they failed due to ductile overstress shear fracture from impact. No evidence of fatigue was observed.

Aircraft

Registration
N65PC
Reported as
Spangenberg AR-1KC
Category
Gyroplane, amateur-built
Serial number
0038
Built
2019
Airframe hours
192
Engine
Rotax 914UL, 115 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Baby Bird Aviation LLC
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · June 9, 2021
Airport
SRQ · Sarasota/Bradenton Intl, runway 4, 5,006 × 150 ft, asphalt
Equipment
Unknown

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
None
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
October 22, 2021
Seat
Front
Restraint
4-point
Flight hours
496 total · 109 in this make and model · 358 as pilot in command · 25 in the last 90 days · 7 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
100° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point 32 °F
Altimeter
30.19 inHg
Observed at
SRQ
METAR
SA 20/02/2022 19:53-> METAR KSRQ 201953Z 10007KT 050V120 10SM CLR 27/09 A3019

Docket · 5

The files NTSB released with the investigation on September 20, 2023, on NTSB’s docket system: statements, records, photos and specialists’ reports. 37.7 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.