# N21PC: Mombourquette Paul SONERAI II B

- Status: Valid registration
- Airframe: [Mombourquette Paul SONERAI II B](https://openairdocs.org/model/mombourquette-paul-sonerai-ii-b) (registry code 05605RO, 2 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Serial number: PM01-0397
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: July 28, 2005
- Certificate issued: January 13, 2014
- Expires: January 31, 2030
- Mode S code: A1B871
- Registered owner: [San Diego Air & Space Museum](https://openairdocs.org/faa-owner/SAN%20DIEGO%20AIR%20%26%20SPACE%20MUSEUM)
- Location: [San Diego, CA](https://openairdocs.org/faa-place/CA/San%20Diego)
- Owner type: Corporation
- Owner's area on the map: 32.7131° N, 117.1731° W: Placed by OpenAirDocs at the center of ZIP code 92101, 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=21PC
- Page: https://openairdocs.org/aircraft/N21PC

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 (Mombourquette Paul SONERAI II B)

None in force.

### Matched by engine (Amateur-built UNKNOWN ENG)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N21PC.

## FAA accident and incident reports

None matched to N21PC.

## 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 N21PC

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N21PC before.

- [Cancelled 1993-10-20](https://openairdocs.org/deregistered/N21PC-1993-10-20): Mitsubishi MU-2B-25, S/N 295. Triennial form not returned. Owner: [Barron Thomas Aviation Inc](https://openairdocs.org/faa-owner/BARRON%20THOMAS%20AVIATION%20INC), [Las Vegas, NM](https://openairdocs.org/faa-place/NM/Las%20Vegas)
- [Cancelled 1979-05-25](https://openairdocs.org/deregistered/N21PC-1979-05-25): Swearingen SA-226AT, S/N AT-064E, built 1977. Exported to Peru. Owner: [Publix Distributing Co Inc](https://openairdocs.org/faa-owner/PUBLIX%20DISTRIBUTING%20CO%20INC), [Morristown, TN](https://openairdocs.org/faa-place/TN/Morristown)

## Related

- Other Mombourquette Paul SONERAI II B aircraft: https://openairdocs.org/model/mombourquette-paul-sonerai-ii-b/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.md

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