# N4937: 1971 Bucker JUNGMEISTER BU133D1

- Status: Valid registration
- Airframe: [Bucker JUNGMEISTER BU133D1](https://openairdocs.org/model/bucker-jungmeister-bu133d1) (registry code 1590304, 1 seats)
- Engine: [Siemens SH14](https://openairdocs.org/engine/siemens-sh14) (registry code 57001)
- Data sheets: [TCDS Group 3 Siemens Halske](https://openairdocs.org/tcds/Group%203%20Siemens%20Halske) (Siemens Halske) (OpenAirDocs)
- Serial number: 2003
- Year built: 1971
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, racing
- Airworthiness date: June 19, 1979
- Certificate issued: February 28, 1996
- Expires: January 31, 2030
- Mode S code: A61E8A
- Registered owner: [Martin James David](https://openairdocs.org/faa-owner/MARTIN%20JAMES%20DAVID)
- Location: [Graford, TX](https://openairdocs.org/faa-place/TX/Graford)
- Owner type: Individual
- Owner's area on the map: 32.9010° N, 98.3163° W: Placed by OpenAirDocs at the center of ZIP code 76449, 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=4937
- Page: https://openairdocs.org/aircraft/N4937

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 (Bucker JUNGMEISTER BU133D1)

None in force.

### Matched by engine (Siemens SH14)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N4937.

## FAA accident and incident reports

None matched to N4937.

## 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) (1)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the engine (Siemens SH14)

- [STC SE04651CH](https://openairdocs.org/stc/SE04651CH): To allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22. Swift Fuels LLC

## Earlier aircraft with N4937

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N4937 before.

- [Cancelled 1934-08-01](https://openairdocs.org/deregistered/N4937-1934-08-01): Ryan B1, S/N 91. Owner: [Orange Co Airways Inc](https://openairdocs.org/faa-owner/ORANGE%20CO%20AIRWAYS%20INC), [Wurtsboro, NY](https://openairdocs.org/faa-place/NY/Wurtsboro)

## Related

- Other Bucker JUNGMEISTER BU133D1 aircraft: https://openairdocs.org/model/bucker-jungmeister-bu133d1/aircraft.md
- The Siemens SH14 engine: https://openairdocs.org/engine/siemens-sh14.md

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