# N589SD: 1999 Pegasus QUANTUM 15

- Status: Valid registration
- Airframe: [Pegasus QUANTUM 15](https://openairdocs.org/model/pegasus-quantum-15) (registry code 05901K6, 2 seats)
- Engine: [Rotax 503 DCDI](https://openairdocs.org/engine/rotax-503-dcdi) (registry code 55566)
- Serial number: 7578
- Year built: 1999
- Type: Weight-shift-control
- Engine type: 2 cycle
- Airworthiness: Experimental, registered before 01/31/08
- Airworthiness date: December 14, 2007
- Certificate issued: October 23, 2025
- Expires: October 31, 2032
- Mode S code: A798EB
- Registered owners: [Walther Frank C](https://openairdocs.org/faa-owner/WALTHER%20FRANK%20C), [Walther Lisa](https://openairdocs.org/faa-owner/WALTHER%20LISA)
- Location: [Greenwood, SC](https://openairdocs.org/faa-place/SC/Greenwood)
- Owner type: Co-owned
- Owner's area on the map: 34.2389° N, 82.1450° W: Placed by OpenAirDocs at the center of ZIP code 29649, 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=589SD
- Page: https://openairdocs.org/aircraft/N589SD

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 (Pegasus QUANTUM 15)

None in force.

### Matched by engine (Rotax 503 DCDI)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N589SD.

## FAA accident and incident reports

None matched to N589SD.

## 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.

## Related

- Other Pegasus QUANTUM 15 aircraft: https://openairdocs.org/model/pegasus-quantum-15/aircraft.md
- The Rotax 503 DCDI engine: https://openairdocs.org/engine/rotax-503-dcdi.md

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