# N721WF: 2024 Walter E Foster JR RANS DESIGNS INC S21

- Status: Valid registration
- Airframe: [Walter E Foster JR RANS DESIGNS INC S21](https://openairdocs.org/model/walter-e-foster-jr-rans-designs-inc-s21) (registry code 056415M, 2 seats)
- Engine: [Titan IO-340](https://openairdocs.org/engine/titan-io-340) (registry code 59690)
- Serial number: 08210196
- Year built: 2024
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Rans Designs Inc S-21 OUTBOUND
- Airworthiness: Experimental, amateur built
- Airworthiness date: May 4, 2024
- Certificate issued: January 30, 2024
- Expires: January 31, 2031
- Mode S code: A9A93D
- Registered owner: [Foster Walter E Jr](https://openairdocs.org/faa-owner/FOSTER%20WALTER%20E%20JR)
- Location: [Hillsboro, OR](https://openairdocs.org/faa-place/OR/Hillsboro)
- Owner type: Individual
- Owner's area on the map: 45.5692° N, 122.9472° W: Placed by OpenAirDocs at the center of ZIP code 97124, 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=721WF
- Page: https://openairdocs.org/aircraft/N721WF

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 (Walter E Foster JR RANS DESIGNS INC S21)

None in force.

### Matched by engine (Titan IO-340)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N721WF.

## FAA accident and incident reports

None matched to N721WF.

## 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 Walter E Foster JR RANS DESIGNS INC S21 aircraft: https://openairdocs.org/model/walter-e-foster-jr-rans-designs-inc-s21/aircraft.md
- The Titan IO-340 engine: https://openairdocs.org/engine/titan-io-340.md

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