- Date
- August 25, 2025, 17:50 local (21:50 UTC)
- Place
- Knoxville, TN · Field
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N4584CCessna 170B
- Defining event
- Landing-landing roll: Loss of control on ground
- Weather
- Visual (VMC) · Day
- Status
- Completed · report November 20, 2025
- Report
- Approved by Office Director
- Investigation class
- Class 4 - Basic report with no Prelim publish
- NTSB office
- Eastern Region Aviation
- Parties
- FAA/FSDO
- FAA report
- 20250825014769A
- Case key
- 200865
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 directional control during landing roll in a crosswind, which resulted in a runway excursion and a subsequent ground loop.
Findings · 3
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.
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 approached the destination airport, and while in the traffic pattern there, the airplane encountered a crosswind. During the base-to-final turn, he was dissatisfied with the airplane’s altitude and performed a go-around. On the subsequent approach, he used rudder inputs to maintain alignment with the runway centerline. After touchdown, the airplane drifted right, and as it decelerated, he applied right rudder but was unable to maintain directional control. The airplane veered off the left side of the runway and ground-looped, coming to rest on the adjacent terrain. The airplane sustained substantial damage to the right wingtip and aileron. The pilot reported that there were no preaccident mechanical malfunctions or failures of the airplane that would have precluded normal operation.
Aircraft
- Registration
- N4584C
- Reported as
- Cessna 170B
- Category
- Airplane
- Serial number
- 25528
- Built
- 1953
- Engine
- Continental O-300, 145 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · May 2, 2025 · 9 hours before
- Departed
- 4O1 · Waynesville, OH
- Destination
- EKQ · Monticello, KY
- Airport
- EKQ · Wayne County, runway 03, 4,000 × 75 ft, asphalt
- Equipment
- Stall warning system
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
- 61
- Injuries
- None
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 3, With waivers/limitations
- Last flight review
- August 23, 2023
- Seat
- Left
- Restraint
- 4-point
- Flight hours
- 729 total · 32 in this make and model · 595 as pilot in command · 7 in the last 90 days · 7 in the last 30 days
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 300° at 9 knots
- Visibility
- 10 statute miles
- Temperature
- 73 °F, dew point 52 °F
- Altimeter
- 30.10 inHg
- Observed at
- EKQ, 12 nm away
- METAR
- METAR KEKQ 252156Z AUTO 30009KT 10SM SCT060 23/11 A3010 RMK AO2 SLP187 T02330106 PNO $=
Docket · 4
The files NTSB released with the investigation on November 20, 2025, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.3 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.