WPR23LA243

NTSB accident investigation · Kitfox 2 · Cave Junction, OR · June 24, 2023

Accident · No injuriesClass 3 · LimitedFinal report
Date
June 24, 2023, 09:00 local (16:00 UTC)
Place
Cave Junction, OR
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N729UKitfox 2
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
Western Pacific Region
Parties
Federal Aviation Administration
FAA report
20230624007889A
Case key
192469

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 failure to maintain proper airspeed and his exceedance of the airplane’s critical angle of attack during takeoff, which resulted in an aerodynamic stall.

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: angle of attackAircraft › Aircraft oper/perf/capability · Not attained/maintainedUnger John L KITFOX II: 1 caseAll aircraft: 990 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotUnger John L KITFOX II: 1 caseAll aircraft: 9,295 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 he was departing at the time of the accident. As the airplane became airborne, it climbed to about 30 ft above ground level and the pilot was applying left rudder to counteract the torque from the engine. The airplane entered an aerodynamic stall and began an uncommanded left turn. The pilot did not have enough altitude to recover and the airplane continued to turn left. The right wing struck a tree and the airplane impacted the ground and came to rest upright. The pilot reported no preimpact mechanical malfunctions or failures that would have precluded normal operation. A postaccident examination revealed that there was no evidence of a mechanical malfunction and all control linkages were intact and operational.

Factual narrative

On June 24, 2023, about 0900 Pacific daylight time, an experimental, amateur-built Kitfox 2, N729U, was substantially damaged when it was involved in an accident near Illinois Valley Airport, Cave Junction, Oregon. The pilot was not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot stated he had flown the airplane to the departure airport the day before to practice maneuvers. He placed the airplane in a hangar overnight and planned for the flight in the following morning. On the day of the accident, after performing a preflight inspection, the pilot departed runway 36. As the airplane became airborne, it climbed to about 30 ft above ground level, with the pilot applying left rudder to counteract the torque from the engine. The airplane entered an aerodynamic stall and began an uncommanded left turn. The pilot did not have enough altitude to recover and the airplane continued to turn left. The right wing struck a tree and the airplane impacted the ground and came to rest upright. The pilot reported no preimpact mechanical malfunctions or failures that would have precluded normal operation. A Federal Aviation Administration certified mechanic examined the airplane following the accident. There was no evidence of a mechanical malfunction and all control linkages were intact and operational.

Aircraft

Registration
N729U
Reported as
Kitfox 2
Category
Airplane, amateur-built
Serial number
729
Built
1992
Airframe hours
306
Engine
HKS 700E, 60 hp, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Condition · June 17, 2023 · 3 hours before
Destination
Same as departure
Airport
3S4 · Illinois Valley Airport, runway 36, 4,800 × 25 ft, asphalt

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
74
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Sport pilot
Last flight review
June 7, 2023
Seat
Left
Restraint
3-point
Flight hours
141 total · 24 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
280° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
55 °F, dew point 54 °F
Altimeter
30.09 inHg
Observed at
KBOK, 25 nm away
METAR
AUTO 28005KT 10SM OVC007 13/12 A3009 RMK AO2 SLP189 T01280117

Docket · 3

The files NTSB released with the investigation on November 26, 2024, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.9 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.