# N11BF: 2024 Alexander Schleicher ASH 31 MI

- Status: Valid registration
- Airframe: [Alexander Schleicher ASH 31 MI](https://openairdocs.org/model/alexander-schleicher-ash-31-mi) (registry code 3801549, 1 seats)
- Engine: [Austro IAE-50R-AA](https://openairdocs.org/engine/austro-iae-50r-aa) (registry code 06401)
- Serial number: 31225
- Year built: 2024
- Type: Glider
- Engine type: Rotary
- Airworthiness: Experimental, racing
- Airworthiness date: April 20, 2024
- Certificate issued: August 6, 2025
- Expires: August 31, 2032
- Mode S code: A029F9
- Registered owner: [Esselstyn Chris](https://openairdocs.org/faa-owner/ESSELSTYN%20CHRIS)
- Location: [Waukesha, WI](https://openairdocs.org/faa-place/WI/Waukesha)
- Owner type: Individual
- Owner's area on the map: 43.0186° N, 88.2940° W: Placed by OpenAirDocs at the center of ZIP code 53188, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=11BF
- Page: https://openairdocs.org/aircraft/N11BF

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 (Alexander Schleicher ASH 31 MI)

None in force.

### Matched by engine (Austro IAE-50R-AA)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N11BF.

## FAA accident and incident reports

None matched to N11BF.

## 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 N11BF

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N11BF before.

- [Cancelled 2018-03-13](https://openairdocs.org/deregistered/N11BF-2018-03-13): Bailey-Finley PITTS S1C, S/N BF-001, built 1970. Registration expired, pending cancellation. Owner: [Sloan Paul J III](https://openairdocs.org/faa-owner/SLOAN%20PAUL%20J%20III), [Artesia, NM](https://openairdocs.org/faa-place/NM/Artesia)

## Related

- Other Alexander Schleicher ASH 31 MI aircraft: https://openairdocs.org/model/alexander-schleicher-ash-31-mi/aircraft.md
- The Austro IAE-50R-AA engine: https://openairdocs.org/engine/austro-iae-50r-aa.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.