# N291SX: 2015 Ervin Geiger JR SONEX

- Status: Valid registration
- Airframe: [Ervin Geiger JR SONEX](https://openairdocs.org/model/ervin-geiger-jr-sonex) (registry code 05633QY, 2 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Serial number: 1558
- Year built: 2015
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Sonex Aircraft LLC SONEX
- Airworthiness: Experimental, amateur built
- Airworthiness date: December 3, 2015
- Certificate issued: August 11, 2014
- Expires: August 31, 2027
- Mode S code: A2FAD7
- Registered owner: [Geiger Ervin Jr](https://openairdocs.org/faa-owner/GEIGER%20ERVIN%20JR)
- Location: [Columbia City, IN](https://openairdocs.org/faa-place/IN/Columbia%20City)
- Owner type: Individual
- Owner's area on the map: 41.1509° N, 85.4798° W: Placed by OpenAirDocs at the center of ZIP code 46725, within about 8 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=291SX
- Page: https://openairdocs.org/aircraft/N291SX

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 (Ervin Geiger JR SONEX)

None in force.

### Matched by engine (Amateur-built UNKNOWN ENG)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N291SX.

## FAA accident and incident reports

None matched to N291SX.

## 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 Ervin Geiger JR SONEX aircraft: https://openairdocs.org/model/ervin-geiger-jr-sonex/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.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.