WPR25LA227

NTSB accident investigation · Hartline J Bon Hartline Kitfox III · Logan, UT · July 22, 2025

Accident · Minor injuriesClass 4 · LimitedFinal report
Date
July 22, 2025, 16:40 local (22:40 UTC)
Place
Logan, UT · On airport
Injuries
1 minor, 1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N422KHartline J Bon Hartline Kitfox III
Defining event
Takeoff: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report October 2, 2025
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
FAA report
20250722020259A
Case key
200648

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 failure to maintain airplane control during takeoff in variable wind and high density altitude conditions.

Findings · 5

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.

Wind: crosswindEnvironmental issues › Conditions/weather/phenomena · Effect on operationHartline J Bon HARTLINE KITFOX III: 1 caseAll aircraft: 1,008 casesProbable cause
Temp/humidity/pressure: high density altitudeEnvironmental issues › Conditions/weather/phenomena · Effect on operationHartline J Bon HARTLINE KITFOX III: 1 caseAll aircraft: 278 casesProbable cause
Performance/control parameters: lateral/bank controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedHartline J Bon HARTLINE KITFOX III: 1 caseAll aircraft: 390 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 tailwheel equipped airplane reported that during takeoff roll, the airplane did not lift off when expected, and that the controls were sluggish. He applied flaps and the airplane “popped up off the runway.” Once airborne, the airplane began to drift to the right and despite the pilot’s corrections, continued to drift to the right. Subsequently, the airplane descended, landed hard, and came to rest upright, about 90° off runway heading. The right wing and fuselage sustained substantial damage. The pilot reported that there were no preaccident mechanical malfunctions or failures that would have precluded normal operation. He added that prior to takeoff, he did not check the windsock prior to takeoff and did not compensate enough for the high density altitude and the airplane being near its maximum gross weight. At the time of the accident, the pilot was taking off on runway 28, with wind variable from 180° to 270° at 9 knots. The calculated density altitude at the time of the accident was 7,501 ft.

Aircraft

Registration
N422K
Reported as
Hartline J Bon Hartline Kitfox III
Category
Airplane, amateur-built
Serial number
1000
Built
1991
Airframe hours
1,270.6
Engine
Rotax 912UL, 80 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · July 20, 2024
Airport
LGU · Logan Cache Airport, runway 28, 4,075 × 60 ft, asphalt
Equipment
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
68
Injuries
Minor
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land
Medical
BasicMed, With waivers/limitations
Last flight review
October 2, 2024
Seat
Left
Restraint
4-point
Flight hours
1,109.7 total · 50.6 in this make and model · 926.3 as pilot in command · 41.3 in the last 90 days · 5.6 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
190° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
90 °F, dew point 36 °F
Altimeter
29.93 inHg
Observed at
KLGU
METAR
METAR KLGU 222251Z AUTO 19007KT 10SM CLR 32/02 A2993

Docket · 2

The files NTSB released with the investigation on October 2, 2025, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.4 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.