# N2421B: Klebs Earl M ZENITH 701 STOL

- Status: Valid registration
- Airframe: [Klebs Earl M ZENITH 701 STOL](https://openairdocs.org/model/klebs-earl-m-zenith-701-stol) (registry code 05615VT, 2 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Serial number: 7-4619
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Zenith Acft Co STOL
- Airworthiness: Experimental, amateur built
- Airworthiness date: November 17, 2004
- Certificate issued: May 8, 2019
- Expires: May 31, 2029
- Mode S code: A239EA
- Registered owner: [Hauff Delmar M](https://openairdocs.org/faa-owner/HAUFF%20DELMAR%20M)
- Location: [Julesburg, CO](https://openairdocs.org/faa-place/CO/Julesburg)
- Owner type: Individual
- Owner's area on the map: 40.8951° N, 102.1989° W: Placed by OpenAirDocs at the center of ZIP code 80737, within about 9 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=2421B
- Page: https://openairdocs.org/aircraft/N2421B

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 (Klebs Earl M ZENITH 701 STOL)

None in force.

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

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N2421B.

## FAA accident and incident reports

None matched to N2421B.

## 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 N2421B

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N2421B before.

- [Cancelled 2000-09-19](https://openairdocs.org/deregistered/N2421B-2000-09-19): Bell 206-L4, S/N 52248. Exported to Mexico. Owner: [Bell Helicopter Textron Inc](https://openairdocs.org/faa-owner/BELL%20HELICOPTER%20TEXTRON%20INC), [Fort Worth, TX](https://openairdocs.org/faa-place/TX/Fort%20Worth)
- [Cancelled 1970-07-13](https://openairdocs.org/deregistered/N2421B-1970-07-13): Temco GC-1B, S/N 3721. Owner: [Elling James E / Lenhart Richard R](https://openairdocs.org/faa-owner/ELLING%20JAMES%20E%20%2F%20LENHART%20RICHARD%20R), [Cashion, OK](https://openairdocs.org/faa-place/OK/Cashion)
- [Cancelled (date not recorded)](https://openairdocs.org/deregistered/N2421B-undated): Piper PA-38-112, S/N 3879A0055. Triennial form not returned

## Related

- Other Klebs Earl M ZENITH 701 STOL aircraft: https://openairdocs.org/model/klebs-earl-m-zenith-701-stol/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.md

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