# N171D: 2020 Donald Mrowzinski RUTAN DEFIANT

- Status: Valid registration
- Airframe: [Donald Mrowzinski RUTAN DEFIANT](https://openairdocs.org/model/donald-mrowzinski-rutan-defiant) (registry code 05639FY, 4 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Serial number: 155
- Year built: 2020
- Type: Fixed wing multi engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: December 30, 2020
- Certificate issued: August 15, 2020
- Expires: August 31, 2027
- Mode S code: A11D2F
- Registered owner: [Mrowzinski Donald J](https://openairdocs.org/faa-owner/MROWZINSKI%20DONALD%20J)
- Location: [Delaware, OH](https://openairdocs.org/faa-place/OH/Delaware)
- Owner type: Individual
- Owner's area on the map: 40.2978° N, 83.0602° W: Placed by OpenAirDocs at the center of ZIP code 43015, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=171D
- Page: https://openairdocs.org/aircraft/N171D

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 (Donald Mrowzinski RUTAN DEFIANT)

None in force.

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

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N171D.

## FAA accident and incident reports

None matched to N171D.

## 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 N171D

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N171D before.

- [Cancelled 2013-07-16](https://openairdocs.org/deregistered/N171D-2013-07-16): Beech E-55, S/N TE-1000, built 1974. Sale reported, canceled. Owner: Spanish Town

## Related

- Other Donald Mrowzinski RUTAN DEFIANT aircraft: https://openairdocs.org/model/donald-mrowzinski-rutan-defiant/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.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.