# N44BZ: 2007 Flight Design CTSW

- Status: Valid registration
- Airframe: [Flight Design CTSW](https://openairdocs.org/model/flight-design-ctsw) (registry code 0600001, 2 seats)
- Engine: [Rotax 912ULS series](https://openairdocs.org/engine/rotax-912uls-series) (registry code 55572)
- Serial number: 07-09-26
- Year built: 2007
- Type: Fixed wing single engine
- Engine type: 4 cycle
- Airworthiness: Light sport, airplane
- Airworthiness date: December 7, 2007
- Certificate issued: July 22, 2026
- Expires: July 31, 2033
- Mode S code: A54875
- Registered owner: [Koenig Steven Fillmore](https://openairdocs.org/faa-owner/KOENIG%20STEVEN%20FILLMORE)
- Location: [San Diego, CA](https://openairdocs.org/faa-place/CA/San%20Diego)
- Owner type: Individual
- Owner's area on the map: 33.0188° N, 117.1241° W: Placed by OpenAirDocs at the center of ZIP code 92127, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=44BZ
- Page: https://openairdocs.org/aircraft/N44BZ

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. The registry lists only the engine series, so ADs for every Rotax 912ULS model are included.

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

### Matched by airframe (Flight Design CTSW)

None in force.

### Matched by engine (Rotax 912ULS series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N44BZ.

## FAA accident and incident reports

None matched to N44BZ.

## 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 N44BZ

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N44BZ before.

- [Cancelled 2004-04-05](https://openairdocs.org/deregistered/N44BZ-2004-04-05): Palmer Robert/Corinne RV-4, S/N 381, built 1987. Exported to United Kingdom. Owner: [Braatz Cannon](https://openairdocs.org/faa-owner/BRAATZ%20CANNON), [Eugene, OR](https://openairdocs.org/faa-place/OR/Eugene)

## Related

- Other Flight Design CTSW aircraft: https://openairdocs.org/model/flight-design-ctsw/aircraft.md
- The Rotax 912ULS series engine: https://openairdocs.org/engine/rotax-912uls-series.md

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