# N501WM: 1974 Martin William S BD5B

- Status: Valid registration
- Airframe: [Martin William S BD5B](https://openairdocs.org/model/martin-william-s-bd5b) (registry code 05602JM, 1 seats)
- Engine: [Hirth F20](https://openairdocs.org/engine/hirth-f20) (registry code 33720)
- Serial number: 1738
- Year built: 1974
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: July 9, 1996
- Certificate issued: March 5, 1996
- Expires: December 31, 2029
- Mode S code: A63FA7
- Registered owner: [Martin William S](https://openairdocs.org/faa-owner/MARTIN%20WILLIAM%20S)
- Location: [S Coffeyville, OK](https://openairdocs.org/faa-place/OK/S%20Coffeyville)
- Owner type: Individual
- Owner's area on the map: 36.9600° N, 95.6161° W: Placed by OpenAirDocs at the center of ZIP code 74072, 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=501WM
- Page: https://openairdocs.org/aircraft/N501WM

From the FAA registry file of October 22, 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 (Martin William S BD5B)

None in force.

### Matched by engine (Hirth F20)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N501WM.

## FAA accident and incident reports

None matched to N501WM.

## 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 Martin William S BD5B aircraft: https://openairdocs.org/model/martin-william-s-bd5b/aircraft.md
- The Hirth F20 engine: https://openairdocs.org/engine/hirth-f20.md

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