# N921MB: Roman Fedorov SONEX

- Status: Valid registration
- Airframe: [Roman Fedorov SONEX](https://openairdocs.org/model/roman-fedorov-sonex) (registry code 056420R, 2 seats)
- Serial number: 1375
- Type: Fixed wing single engine
- Engine type: 4 cycle
- Certificate issued: July 22, 2025
- Expires: July 31, 2032
- Mode S code: ACC2F6
- Registered owner: [Fedorov Roman](https://openairdocs.org/faa-owner/FEDOROV%20ROMAN)
- Location: [Walnut Creek, CA](https://openairdocs.org/faa-place/CA/Walnut%20Creek)
- Owner type: Individual
- Owner's area on the map: 37.9177° N, 122.0718° W: Placed by OpenAirDocs at the center of ZIP code 94597, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=921MB
- Page: https://openairdocs.org/aircraft/N921MB

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 (Roman Fedorov SONEX)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N921MB.

## FAA accident and incident reports

None matched to N921MB.

## 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.

## Earlier aircraft with N921MB

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N921MB before.

- [Cancelled 2011-05-12](https://openairdocs.org/deregistered/N921MB-2011-05-12): Rockwell International NA-265-60, S/N 306-135, built 1977. Exported to Ecuador. Owner: [Eagle Investments International Inc](https://openairdocs.org/faa-owner/EAGLE%20INVESTMENTS%20INTERNATIONAL%20INC), [Miami, FL](https://openairdocs.org/faa-place/FL/Miami)

## Related

- Other Roman Fedorov SONEX aircraft: https://openairdocs.org/model/roman-fedorov-sonex/aircraft.md

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