# N231FB: 2025 Ryan Welsch KITFOX S7

- Status: Valid registration
- Airframe: [Ryan Welsch KITFOX S7](https://openairdocs.org/model/ryan-welsch-kitfox-s7) (registry code 05641P5, 2 seats)
- Engine: [Rotax 912 IS series](https://openairdocs.org/engine/rotax-912-is-series) (registry code 55593)
- Data sheets: [TCDS E00051EN](https://openairdocs.org/tcds/E00051EN) (BRP-Rotax GmbH & Co KG) (OpenAirDocs)
- Serial number: KA21314523
- Year built: 2025
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Kitfox Aircraft LLC S7 SUPER SPORT
- Airworthiness: Experimental, amateur built
- Airworthiness date: December 31, 2025
- Certificate issued: March 5, 2026
- Expires: March 31, 2033
- Mode S code: A20CB6
- Registered owner: [N231fb LLC](https://openairdocs.org/faa-owner/N231FB%20LLC)
- Location: [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington)
- Owner type: LLC
- Owner's area on the map: 39.7376° N, 75.6671° W: Placed by OpenAirDocs at the center of ZIP code 19808, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=231FB
- Page: https://openairdocs.org/aircraft/N231FB

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 912 IS model are included.

## ADs that may apply (OpenAirDocs): 3 in force

### Matched by airframe (Ryan Welsch KITFOX S7)

None in force.

### Matched by engine (Rotax 912 IS series)

- [AD 2026-16-11](https://openairdocs.org/ad/2026-16-11): Reciprocating Engine Front Section · BRP-Rotax 912 F2, 912 F3, 912 F4 and 16 more. Effective Aug 28, 2026
- [AD 2025-15-03](https://openairdocs.org/ad/2025-15-03): Reciprocating Engine Oil System · BRP-Rotax 912 iSc2 Sport, 912 iSc3 Sport, 915 iSc2 C24 and 1 more. Effective Aug 6, 2025
- [AD 2023-17-13](https://openairdocs.org/ad/2023-17-13): Reciprocating Engine Front Section · BRP-Rotax 912 F2, 912 F3, 912 F4 and 16 more. Effective Sep 20, 2023

### Historical (superseded or no longer in force)

- [AD 2025-07-02](https://openairdocs.org/ad/2025-07-02) (historical): Reciprocating Engine Oil System · BRP-Rotax 912 iSc2 Sport, 912 iSc3 Sport, 915 iSc2 C24 and 1 more. Effective Apr 21, 2025

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N231FB.

## FAA accident and incident reports

None matched to N231FB.

## Reports on N231FB not matched to an aircraft (1)

They name N231FB, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [Incident 20030411007369I](https://openairdocs.org/incident/20030411007369I), Apr 11, 2003: Mooney M20K (N231FB), Point Lookout, MO, Minor damage. (-23) PIC cancelled IFR approximately 18 miles se plk. He continued inbound and entered a left base for runway 29; however, he neglected to extend the landing…

## 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 Ryan Welsch KITFOX S7 aircraft: https://openairdocs.org/model/ryan-welsch-kitfox-s7/aircraft.md
- The Rotax 912 IS series engine: https://openairdocs.org/engine/rotax-912-is-series.md

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