# N121ST: Hylio AG 230

- Status: Valid registration
- Airframe: [Hylio AG 230](https://openairdocs.org/model/hylio-ag-230) (registry code 06102EY)
- Serial number: 17906100252
- Type: Rotorcraft
- Engine type: Electric
- Certificate issued: May 2, 2025
- Expires: May 31, 2032
- Mode S code: A0590B
- Registered owner: [Trost Scot A](https://openairdocs.org/faa-owner/TROST%20SCOT%20A)
- Location: [Lenox, IA](https://openairdocs.org/faa-place/IA/Lenox)
- Owner type: Individual
- Owner's area on the map: 40.9086° N, 94.5370° W: Placed by OpenAirDocs at the center of ZIP code 50851, within about 7 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=121ST
- Page: https://openairdocs.org/aircraft/N121ST

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 (Hylio AG 230)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N121ST.

## FAA accident and incident reports

None matched to N121ST.

## 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 N121ST

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N121ST before.

- [Cancelled 2015-05-13](https://openairdocs.org/deregistered/N121ST-2015-05-13): Poellien Gary R ADVCD AVIA BUCCNR SX, S/N BUC.SX.0027. Registration expired, pending cancellation. Owner: [Poellien Gary R](https://openairdocs.org/faa-owner/POELLIEN%20GARY%20R), [Rockledge, FL](https://openairdocs.org/faa-place/FL/Rockledge)
- [Cancelled 1992-02-27](https://openairdocs.org/deregistered/N121ST-1992-02-27): Hacker Stephen W GLASAIR III, S/N 3157. Administratively canceled. Owner: [Hacker Stephen W](https://openairdocs.org/faa-owner/HACKER%20STEPHEN%20W), [Albuquerque, NM](https://openairdocs.org/faa-place/NM/Albuquerque)

## Related

- Other Hylio AG 230 aircraft: https://openairdocs.org/model/hylio-ag-230/aircraft.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.