# N6731: 1928 Universal Moulded Products MONOCOUPE 70

- Status: Valid registration
- Airframe: [Universal Moulded Products MONOCOUPE 70](https://openairdocs.org/model/universal-moulded-products-monocoupe-70) (registry code 9250202, 2 seats)
- Engine: [Universal VELIE M5](https://openairdocs.org/engine/universal-velie-m5) (registry code 63001)
- Data sheets: [TCDS ATC 70 Universal Moulded](https://openairdocs.org/tcds/ATC%2070%20Universal%20Moulded) (Universal Moulded Aircraft Corporation), [TCDS ATC 4](https://openairdocs.org/tcds/ATC%204) (Universal Moulded Aircraft Corporation) (OpenAirDocs)
- Serial number: 134
- Year built: 1928
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: June 7, 1963
- Certificate issued: November 30, 2007
- Expires: January 31, 2029
- Mode S code: A8E958
- Registered owner: [Golden Age Air Museum](https://openairdocs.org/faa-owner/GOLDEN%20AGE%20AIR%20MUSEUM)
- Location: [Bethel, PA](https://openairdocs.org/faa-place/PA/Bethel)
- Owner type: Corporation
- Owner's area on the map: 40.5052° N, 76.2703° W: Placed by OpenAirDocs at the center of ZIP code 19507, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=6731
- Page: https://openairdocs.org/aircraft/N6731

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 (Universal Moulded Products MONOCOUPE 70)

None in force.

### Matched by engine (Universal VELIE M5)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N6731.

## NTSB investigations on N6731 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 NYC67I0138](https://openairdocs.org/ntsb/NYC67I0138), Apr 11, 1967: Boeing B-727 (N6731), Boston, MA, incident, minor damage

## FAA accident and incident reports

None matched to N6731.

## 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) (2)

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 airframe (Universal Moulded Products MONOCOUPE 70)

- [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC

### Approved for the engine (Universal VELIE M5)

- [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

## Related

- Other Universal Moulded Products MONOCOUPE 70 aircraft: https://openairdocs.org/model/universal-moulded-products-monocoupe-70/aircraft.md
- The Universal VELIE M5 engine: https://openairdocs.org/engine/universal-velie-m5.md

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