# N2140: Otto Zauner 4

- Status: Valid registration
- Airframe: [Otto Zauner 4](https://openairdocs.org/model/otto-zauner-4) (registry code 056039H, 1 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Serial number: 0Z-4
- Type: Glider
- Engine type: None
- Airworthiness: Experimental, amateur built
- Airworthiness date: July 13, 1979
- Certificate issued: September 29, 2021
- Expires: September 30, 2028
- Mode S code: A1CAB6
- Registered owner: [Martens John T](https://openairdocs.org/faa-owner/MARTENS%20JOHN%20T)
- Location: [Centralia, WA](https://openairdocs.org/faa-place/WA/Centralia)
- Owner type: Individual
- Owner's area on the map: 46.7427° N, 122.9016° W: Placed by OpenAirDocs at the center of ZIP code 98531, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=2140
- Page: https://openairdocs.org/aircraft/N2140

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 (Otto Zauner 4)

None in force.

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

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N2140.

## NTSB investigations on N2140 not matched to an aircraft (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB CHI72FEP30](https://openairdocs.org/ntsb/CHI72FEP30), Jan 20, 1972: Cessna 337 (N2140), Woodruff, WI, destroyed, 1 fatal

## FAA accident and incident reports

None matched to N2140.

## 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.

## Service difficulty reports on N2140 not matched to an aircraft (1)

They name N2140, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [SDR 96ZZZX365](https://openairdocs.org/sdr/96ZZZX365), Dec 6, 1995: FAN WHEEL. DISINTEGRATED. FAN WHEEL DISINTEGRATED - ONLY END PLATE LEFT. ALL VANES GONE. MULTIPLE FAILURES OF THESE UNITS RECENTLY. SUBMITTER STATED APPEARS TO BE CAUSED BY IMBALANCE. FA

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Earlier aircraft with N2140

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N2140 before.

- [Cancelled 1932-12-12](https://openairdocs.org/deregistered/N2140-1932-12-12): Thomas Morse SCOUT, S/N 202 SUB. Owner: [Cross G C Et Al](https://openairdocs.org/faa-owner/CROSS%20G%20C%20ET%20AL), [Austin, TX](https://openairdocs.org/faa-place/TX/Austin)

## Related

- Other Otto Zauner 4 aircraft: https://openairdocs.org/model/otto-zauner-4/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.md

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