# N4BU: 2021 James Gregory Baron RV10

- Status: Valid registration
- Airframe: [James Gregory Baron RV10](https://openairdocs.org/model/james-gregory-baron-rv10) (registry code 056389G, 4 seats)
- Engine: [Lycoming XIO-540 SERIE](https://openairdocs.org/engine/lycoming-xio-540-serie) (registry code 41462)
- Serial number: 41102
- Year built: 2021
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Vans Aircraft Inc RV-10
- Airworthiness: Experimental, amateur built
- Airworthiness date: May 5, 2023
- Certificate issued: March 31, 2020
- Expires: March 31, 2030
- Mode S code: A4A81B
- Registered owner: [Baron James G](https://openairdocs.org/faa-owner/BARON%20JAMES%20G)
- Location: [Colorado Springs, CO](https://openairdocs.org/faa-place/CO/Colorado%20Springs)
- Owner type: Individual
- Owner's area on the map: 38.8626° N, 104.8705° W: Placed by OpenAirDocs at the center of ZIP code 80904, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4BU
- Page: https://openairdocs.org/aircraft/N4BU

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (James Gregory Baron RV10)

None in force.

### Matched by engine (Lycoming XIO-540 SERIE)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N4BU.

## FAA accident and incident reports

None matched to N4BU.

## Reports on N4BU not matched to an aircraft (1)

They name N4BU, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [Incident 19780328011389I](https://openairdocs.org/incident/19780328011389I), Mar 28, 1978: Cessna 337 (N4BU), East Alton, IL, Minor damage. Cabin filled with smoke and fumes. Broken exhaust stack burned into fiberglass air duct.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Related

- Other James Gregory Baron RV10 aircraft: https://openairdocs.org/model/james-gregory-baron-rv10/aircraft.md
- The Lycoming XIO-540 SERIE engine: https://openairdocs.org/engine/lycoming-xio-540-serie.md

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.