# N4127D: 2024 Peter T Nelson STOL 750 SD

- Status: Valid registration
- Airframe: [Peter T Nelson STOL 750 SD](https://openairdocs.org/model/peter-t-nelson-stol-750-sd) (registry code 0564125, 3 seats)
- Engine: [Ulpower UL-520 series](https://openairdocs.org/engine/ulpower-ul-520-series) (registry code 62002)
- Serial number: SD75-11432
- Year built: 2024
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Zenith Aircraft Co STOL CH 750 SD
- Airworthiness: Experimental, amateur built
- Airworthiness date: December 10, 2024
- Certificate issued: January 2, 2024
- Expires: January 31, 2031
- Mode S code: A4DEDF
- Owner type: Individual
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4127D
- Page: https://openairdocs.org/aircraft/N4127D

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 Ulpower UL-520 model are included.

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

### Matched by airframe (Peter T Nelson STOL 750 SD)

None in force.

### Matched by engine (Ulpower UL-520 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N4127D.

## FAA accident and incident reports

None matched to N4127D.

## 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 N4127D

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N4127D before.

- [Cancelled 1964-07-30](https://openairdocs.org/deregistered/N4127D-1964-07-30): Helio H-391B, S/N 060. Exported to Philippines. Owner: [Jungle Aviation Radio Service Inc](https://openairdocs.org/faa-owner/JUNGLE%20AVIATION%20RADIO%20SERVICE%20INC), [Waxhaw, NC](https://openairdocs.org/faa-place/NC/Waxhaw)

## Related

- Other Peter T Nelson STOL 750 SD aircraft: https://openairdocs.org/model/peter-t-nelson-stol-750-sd/aircraft.md
- The Ulpower UL-520 series engine: https://openairdocs.org/engine/ulpower-ul-520-series.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.