Amateur-built TX-11C accident near Longmont, Colorado, May 24, 2021
On May 24, 2021 at about 4:45 pm local time, a 2012 amateur-built TX-11C, registered N752T, was substantially damaged in an accident near Longmont, Colorado (Vance Brand Airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 1 person was 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 loss of directional control when his foot became stuck on a protruding bolt in the airplane’s floorboard.
Source: NTSB aviation accident database, copy made October 4, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- May 24, 2021 · about 4:45 pm local time
- Place
- Longmont, Colorado · Vance Brand Airport · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Amateur-built TX-11C, built 2012
- Registration
- N752T · registry record · serial 1015
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
The pilot reported that, during the landing roll in the experimental amateur built airplane, the heel of his shoe became caught on a protruding floorboard bolt and the airplane veered to the left. The airplane exited the left side of the runway, impacted a Visual Approach Slope Indicator light, nosed over, and came to rest upside down. The airplane sustained substantial damage to the rudder. The pilot reported that there were no mechanical failures or malfunctions with the airplane that 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
- 552230 during descent - emergency
- 552300 during descent - emergency
- 552096 during descent - emergency
The NTSB's findings
- Aircraft › Aircraft oper/perf/capability › Performance/control parameters › Directional control › Not attained/maintained
- Aircraft › Aircraft structures › Fuselage › Equip attach fittings (on fus) › Design
- Aircraft › Aircraft structures › Fuselage › Floor panels (aux fuselage) › Design
- Personnel issues › Task performance › Use of equip/info › Aircraft control › Pilot
Pilot
- Ratings: multi-engine land, single-engine land, none, APLN, none
- Flight time: 2,330 hours in all; 43 in this make and model; 6 in the last 90 days; 3 in the last 30 days; 2,100 as pilot in command
- Last flight review: August 14, 2020
- Medical certificate: basicmed
- Injury: no injuries
The aircraft
- Airframe total time: 170 hours
- Last inspection: condition inspection, October 31, 2020; 155 hours since
- Maximum gross weight: 1,370 lb
- Seats: 2
- Landing gear: fixed
- Engine: Continental Motors 0-200 SERIES (piston); 170 hours total
- Operating certificate: in the vicinity
The flight
- Flight plan: none
- Runway 29, 4,799 ft by 75 ft
Weather at the time
- Light: daylight
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 63°C, dew point 43°C
- Altimeter: 30.07 inHg
- Observation at 10:55 am from KLMO
Weather report (METAR): KLMO 241655Z AUTO 00000KT 10SM CLR 17/06 A3007 RMK AO2 T01740057
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flig | 1 |
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 docket at the NTSB holds the report as a PDF and the investigation's photographs and documents. This site 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 CEN21LA236.