Vans Aircraft INC RV-7 accident near Boulder, Colorado, April 10, 2021
On April 10, 2021 at about 2:58 am local time, a 2001 Vans Aircraft INC RV-7, registered N137RV, was substantially damaged in an accident during enroute (descent) near Boulder, Colorado. It was a business 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).
The NTSB's probable cause their words, unchanged
a bird strike.
Source: NTSB aviation accident database, copy made November 2, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- April 10, 2021 · about 2:58 am local time · cases in 2021
- Place
- Boulder, Colorado · cases near this airport · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Vans Aircraft INC RV-7, built 2001
- Registration
- N137RV · registry record · serial 1
- Damage
- Substantial damage
- Flight
- Business flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
According to the pilot, the flight was one leg of a trip to the Sun 'n Fun aviation event in Florida, at which he would be working in the manufacturer’s company booth. The intended destination was Rocky Mountain Metropolitan Airport (KBJC), Broomfield, Colorado. The flight to the eastern Rocky Mountain area was uneventful, and the airplane was in cruise at 13,500 feet for terrain clearance. Shortly after beginning the descent the pilot reported hearing and feeling a loud impact sound and rushing air, immediately followed by a violent and sudden ripping apart of the plexiglass canopy. The pilot reported his headset and glasses were blown off. The pilot reported he initially had difficulty controlling the airplane and reading the instruments, but regained control and successfully made an emergency landing at Boulder Airport (KBDU). Initial inspection of the damage to the canopy indicated a small half-round hole in the side of the canopy. Initially, it was suspected that the damage was possibly caused by a hard body object such as a small unmanned aircraft system (sUAS/drone). However, further examination indicated the hole was consistent with the headset cable location as it was blown free, and no foreign material was found in the airplane. Although no foreign biological material was found, the location and altitude of the event was over remote mountainous terrain, indicating the collision was more likely a bird.
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
- Birdstrike during enroute (descent) defining event
The NTSB's findings
- Environmental issues › Physical environment › Object/animal/substance › Animal(s)/bird(s) › Effect on equipment
Pilot
- Certificate: private
- Ratings: single-engine land
- Flight time: 1,650 hours in all; 80 in this make and model; 15 in the last 90 days; 9 in the last 30 days; 1,650 as pilot in command
- Last flight review: January 19, 2021
- Medical certificate: Class 3 (with waivers/limitations)
- Seat: left
- Injury: no injuries
The aircraft
- Airframe total time: 2,528 hours
- Last inspection: 100-hour inspection, January 12, 2021
- Maximum gross weight: 1,800 lb
- Seats: 2
- Landing gear: fixed
- Operator: Vans Aircraft Inc
The flight
- Departed from: KMAN Nampa ID at 11:00 pm
- Destination: KBJC Boulder CO
- Flight plan: none
Weather at the time
- Light: dusk
- Sky: clear
- Temperature: 14°F (-10°C), dew point 27°F (-3°C)
- Observation at 8:00 pm from KBJC, 10 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 1 |
Photographs from the investigation 3 pictures from the NTSB's docket, as the NTSB released them
The NTSB's photographs with the NTSB's captions, at screen size. Open a picture to see it full size or to report one that should not be shown.
Documents from the investigation the NTSB's docket: the evidence folder behind the report
2 documents, released by the NTSB on January 6, 2022. View them here, or download them; the NTSB redacts some personal details before release, and this site shows the NTSB's own titles rather than its file names.
| # | Document | What it is | |
|---|---|---|---|
| 1 | Pilot/operator Aircraft Accident Report, NTSB Form 6120.1 | PDF, 11 pages | View Download |
| 2 | Map and Photos | PDF, 3 pages · our copy | View Download |
The same docket at the NTSB · documents without a copy here are fetched from the NTSB when you open them.
Connections how this case links to the rest of the register
- N137RV on the register today · the tail number may have moved to another aircraft since
- Boulder Municipal · nearest airport
- Nampa Municipal · departed from
- Rocky Mountain Metro Airport · bound for
- Accidents and incidents in Colorado 2,860 since 1982 · 383 in the last ten years
- Colorado 7,483 aircraft registered
The whole map of how records connect · these connections as data: /graph/accident/DCA21LA120.json.
The bigger picture in Aviation Analytics: accidents over time since 1982, by model, by phase of flight and conditions, by place and on the map.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text does not name anyone involved, its policy at this time. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.