Universal Stinson 108-2 accident near Byron, California, January 27, 2022
On January 27, 2022 at about 10:45 pm local time, a 1947 Universal Stinson 108-2, registered N9433K, was substantially damaged in an accident during landing (landing roll) near Byron, California (Byron airport). It was an instructional flight under general aviation rules (Part 91). No one was hurt; 2 people were on board or involved. The weather was visual conditions (good weather).
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The NTSB's probable cause their words, unchanged
The pilot’s inadequate flare and loss of directional control during landing which resulted in a runway excursion. Contributing to the accident was the instructor’s delayed remedial action.
Source: NTSB aviation accident database, copy made October 4, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- January 27, 2022 · about 10:45 pm local time
- Place
- Byron, California · Byron · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Universal Stinson 108-2, built 1947 · all 108-2s on the register
- Registration
- N9433K · registry record · serial 1082433
- Damage
- Substantial damage
- Flight
- Instructional flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
The flight instructor of a tail wheel equipped airplane reported that, while practicing touch-and-go landings the pilot receiving instruction made a landing which resulted in a “medium bounce”. During the second flare the airplane immediately yawed left. The pilot corrected to the right and back to the left. The flight instructor tried to intervene; however, the airplane exited the side of the runway. The left wing was substantially damaged. The flight instructor reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
What happened, in order
- Loss of control on ground during landing (landing roll) defining event
- Runway excursion during landing (landing roll)
- Attempted remediation/recovery during landing (flare/touchdown)
The NTSB's findings
- Personnel issues › Task performance › Use of equip/info › Aircraft control › Pilot
- Personnel issues › Action/decision › Action › Delayed action › Instructor/check pilot
- Aircraft › Aircraft oper/perf/capability › Performance/control parameters › Directional control › Not attained/maintained
- Personnel issues › Action/decision › Info processing/decision › Decision making/judgment › Pilot
- Aircraft › Aircraft oper/perf/capability › Performance/control parameters › Landing flare › Not attained/maintained
Pilot
- Certificate: private
- Ratings: single-engine land
- Flight time: 108 hours in all; 57 in this make and model
- Medical certificate: Class 3
- Seat: left
- Injury: no injuries
Flight instructor
- Certificate: airline transport pilot, flight instructor, commercial pilot
- Ratings: multi-engine land; single-engine land; instructor: airplane multi-engine; instructor: airplane single-engine; instrument: airplane; rotorcraft: balloon; rotorcraft: glider
- Flight time: 16,300 hours in all; 57 in this make and model; 350 on instruments
- Last flight review: November 9, 2021
- Medical certificate: Class 1
- Seat: rgt
- Injury: no injuries
The aircraft
- Airframe total time: 2,813.2 hours
- Last inspection: annual inspection, October 12, 2021
- Maximum gross weight: 2,330 lb
- Seats: 4
- Landing gear: fixed
- Engine: Franklin GA4-165 SERIE (piston); 0 hours total
The flight
- Departed from: KSCK Stockton CA at 10:00 pm
- Destination: C83 Byron CA
- Flight plan: none
- Runway 30, 4,500 ft by 100 ft
- A second pilot was aboard
Weather at the time
- Light: daylight
- Sky: clear
- Temperature: 63°F (17°C), dew point 0°F (-18°C)
- Altimeter: 29.92 inHg
- Observation at 2:00 pm from KSCK
Weather report (METAR): METAR KSCK 272055Z 00000KT 10SM CLR 16/03 A3023 RMK AO2 SLP236 T01610033 58010=
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flig | 2 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
About this page
Everything above comes from the NTSB's public accident database: the narrative, probable cause and findings are the NTSB's own words, and the coded tables behind its report (pilot, aircraft, flight, weather, injuries, sequence of events) are written out in plain English. Pilots' ages, home towns and medical details are left out on purpose. The documents and photographs are the NTSB's docket, the folder of records gathered during the investigation, shown as the NTSB released them (the NTSB redacts some personal details first) and listed under the NTSB's own titles. This site's own text never names pilots, passengers or anyone else involved. A preliminary report describes what is known soon after the event and can change; the final report, with the probable cause, usually follows one to two years later and this page is refreshed when it does. Case number WPR22LA085.