WPR23LA085

NTSB accident investigation · Auto-Gyro Cavalon · Benson, AZ · December 19, 2022

Accident · Minor injuriesClass 4 · LimitedFinal report
Date
December 19, 2022
Place
Benson, AZ
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N518DTAuto-Gyro Cavalon
Defining event
Takeoff: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Western Pacific Region
Parties
Scottsdale FSDO
FAA report
20221219020519A
Case key
106555

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

A loss of directional control on takeoff, which resulted in the collapse of the nose wheel strut and a 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: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedDavid L Thompson CAVALON: 1 caseAll aircraft: 3,958 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 of the gyroplane reported that, typically after reaching a speed of about 45-50 mph during the takeoff roll and just before takeoff, the nosewheel becomes light. He stated that for the accident flight the nose became light as expected, but then suddenly dropped, and the nose gear contacted the runway hard. The gyroplane veered left, and he depressed full right rudder. The main rotor impacted the runway, and the gyroplane departed the runway and came to rest on its side, sustaining substantial damage to the fuselage, tail boom, and rotor system. A postaccident examination of the flight controls revealed no anomalies. Further examination revealed the nose gear appeared to be bent aft and right and exhibited damage consistent with a hard impact. The runway surface exhibited witness marks consistent with a hard impact of the nose gear.

Aircraft

Registration
N518DT
Reported as
Auto-Gyro Cavalon
Category
Helicopter, amateur-built
Serial number
V00251
Built
2016
Airframe hours
425
Engine
Rotax 914 UL, 115 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental light sport (Special)
Departed
E95 · Benson, AZ
Destination
E95 · Benson, AZ
Airport
E95 · Benson Municpal, runway 10, 4,002 × 75 ft, asphalt
Equipment
ADS-B, Satellite tracking device, Onboard weather, Electronic multifunction display, Electronic flight bag or handheld device

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
Minor
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
September 24, 2019
Seat
Right
Restraint
4-point
Flight hours
1,234 total · 425 in this make and model · 1,133 as pilot in command · 10 in the last 90 days · 6 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
46 °F, dew point 27 °F
Altimeter
30.26 inHg
Observed at
KFHU, 27 nm away
METAR
SPECI KFHU 191651Z AUTO 00000KT 10SM CLR 08/M03 A3026 RMK AO2 SLP236=

Docket · 5

The files NTSB released with the investigation on March 2, 2023, on NTSB’s docket system: statements, records, photos and specialists’ reports. 7.3 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.