# N33900: 1946 Mercury BT-120

- Status: Valid registration
- Airframe: [Mercury BT-120](https://openairdocs.org/model/mercury-bt-120) (registry code 5600102, 2 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Data sheets: [TCDS TC 744](https://openairdocs.org/tcds/TC%20744) (Mercury Aircraft Corporation) (OpenAirDocs)
- Serial number: 2
- Year built: 1946
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: June 25, 1946
- Certificate issued: April 29, 2019
- Expires: April 30, 2029
- Mode S code: A3B9AF
- Registered owner: [Western Antique Aeroplane & Automobile Museum](https://openairdocs.org/faa-owner/WESTERN%20ANTIQUE%20AEROPLANE%20%26%20AUTOMOBILE%20MUSEUM)
- Location: [Hood River, OR](https://openairdocs.org/faa-place/OR/Hood%20River)
- Owner type: Corporation
- Owner's area on the map: 45.6068° N, 121.6023° W: Placed by OpenAirDocs at the center of ZIP code 97031, within about 7 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=33900
- Page: https://openairdocs.org/aircraft/N33900

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 (Mercury BT-120)

None in force.

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

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N33900.

## FAA accident and incident reports

None matched to N33900.

## 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 airframe (Mercury BT-120)

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

## Related

- Other Mercury BT-120 aircraft: https://openairdocs.org/model/mercury-bt-120/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.md

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