# N84ST: 2025 Steven A Thoma SLING TSI

- Status: Valid registration
- Airframe: [Steven A Thoma SLING TSI](https://openairdocs.org/model/steven-a-thoma-sling-tsi) (registry code 05643CY, 4 seats)
- Engine: [Rotax 916 IS series](https://openairdocs.org/engine/rotax-916-is-series) (registry code 55622)
- Data sheets: [TCDS E00051EN](https://openairdocs.org/tcds/E00051EN) (BRP-Rotax GmbH & Co KG) (OpenAirDocs)
- Serial number: 593SK
- Year built: 2025
- Type: Fixed wing single engine
- Engine type: 4 cycle
- Kit: Airplane Factory Inc SLING TSI
- Airworthiness: Experimental, amateur built
- Airworthiness date: October 21, 2025
- Certificate issued: August 13, 2025
- Expires: August 31, 2032
- Mode S code: AB7F22
- Registered owner: [Sky Slingers Flying Club - Spc Inc](https://openairdocs.org/faa-owner/SKY%20SLINGERS%20FLYING%20CLUB%20-%20SPC%20INC)
- Location: [Redwood City, CA](https://openairdocs.org/faa-place/CA/Redwood%20City)
- Owner type: Corporation
- Owner's area on the map: 37.4989° N, 122.1988° W: Placed by OpenAirDocs at the center of ZIP code 94063, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=84ST
- Page: https://openairdocs.org/aircraft/N84ST

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 916 IS model are included.

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

### Matched by airframe (Steven A Thoma SLING TSI)

None in force.

### Matched by engine (Rotax 916 IS series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N84ST.

## FAA accident and incident reports

None matched to N84ST.

## 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 N84ST

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N84ST before.

- [Cancelled 2013-09-11](https://openairdocs.org/deregistered/N84ST-2013-09-11): Forrest-Kenneth VARIEZE, S/N 148, built 1978. Registration expired, pending cancellation. Owner: [Blanchard Charles H Jr](https://openairdocs.org/faa-owner/BLANCHARD%20CHARLES%20H%20JR), [Gulf Breeze, FL](https://openairdocs.org/faa-place/FL/Gulf%20Breeze)

## Related

- Other Steven A Thoma SLING TSI aircraft: https://openairdocs.org/model/steven-a-thoma-sling-tsi/aircraft.md
- The Rotax 916 IS series engine: https://openairdocs.org/engine/rotax-916-is-series.md

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