# N2561E: 2004 Koester William A SPORT 2-S

- Status: Valid registration
- Airframe: [Koester William A SPORT 2-S](https://openairdocs.org/model/koester-william-a-sport-2-s) (registry code 05902G2, 2 seats)
- Engine: [Rotax 582SER](https://openairdocs.org/engine/rotax-582ser) (registry code 55556)
- Serial number: 0091
- Year built: 2004
- Type: Fixed wing single engine
- Engine type: 2 cycle
- Airworthiness: Experimental, registered before 01/31/08
- Airworthiness date: August 8, 2007
- Certificate issued: August 28, 2020
- Expires: August 31, 2027
- Mode S code: A27048
- Registered owner: [Maas Michael J](https://openairdocs.org/faa-owner/MAAS%20MICHAEL%20J)
- Location: [Newton Falls, OH](https://openairdocs.org/faa-place/OH/Newton%20Falls)
- Owner type: Individual
- Owner's area on the map: 41.1756° N, 80.9777° W: Placed by OpenAirDocs at the center of ZIP code 44444, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=2561E
- Page: https://openairdocs.org/aircraft/N2561E

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 (Koester William A SPORT 2-S)

None in force.

### Matched by engine (Rotax 582SER)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N2561E.

## FAA accident and incident reports

None matched to N2561E.

## 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 N2561E

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N2561E before.

- [Cancelled 1997-06-02](https://openairdocs.org/deregistered/N2561E-1997-06-02): Balloon Works FIREFLY 9, S/N F9058. Exported to Canada. Owner: [Wicks Enterprises Inc DBA](https://openairdocs.org/faa-owner/WICKS%20ENTERPRISES%20INC%20DBA), [Snohomish, WA](https://openairdocs.org/faa-place/WA/Snohomish)
- [Cancelled 1952-02-26](https://openairdocs.org/deregistered/N2561E-1952-02-26): Aeronca 7AC, S/N 7AC-6144. Owner: [Greenville Aviation Inc](https://openairdocs.org/faa-owner/GREENVILLE%20AVIATION%20INC), [Greenville, NC](https://openairdocs.org/faa-place/NC/Greenville)

## Related

- Other Koester William A SPORT 2-S aircraft: https://openairdocs.org/model/koester-william-a-sport-2-s/aircraft.md
- The Rotax 582SER engine: https://openairdocs.org/engine/rotax-582ser.md

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