# N121R: 1943 Boeing PT-13D

- Status: Valid registration
- Airframe: [Boeing PT-13D](https://openairdocs.org/model/boeing-pt-13d) (registry code 1380122, 2 seats)
- Engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016)
- Serial number: 75-5510
- Year built: 1943
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, racing
- Airworthiness date: April 18, 1979
- Certificate issued: May 9, 1991
- Expires: May 31, 2027
- Mode S code: A058E0
- Registered owner: [Herzog Contracting Corp](https://openairdocs.org/faa-owner/HERZOG%20CONTRACTING%20CORP)
- Location: [St Joseph, MO](https://openairdocs.org/faa-place/MO/St%20Joseph)
- Owner type: Corporation
- Owner's area on the map: 39.7686° N, 94.8466° W: Placed by OpenAirDocs: center of St. Joseph, MO, 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=121R
- Page: https://openairdocs.org/aircraft/N121R

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. The registry lists only the engine series, so ADs for every Pratt & Whitney R1340 model are included.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Boeing PT-13D)

None in force.

### Matched by engine (Pratt & Whitney R1340 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations (2)

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 DEN77FQA35](https://openairdocs.org/ntsb/DEN77FQA35), May 12, 1977: Stearman E75 (N121R), Cuba, NM, substantial damage
- [NTSB OAK76FXQ15](https://openairdocs.org/ntsb/OAK76FXQ15), Sep 12, 1975: Stearman PT-17 (N121R), Reno, NV, minor damage, 1 fatal

## FAA accident and incident reports (2)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 19770512010579A](https://openairdocs.org/incident/19770512010579A), May 12, 1977: Boeing PT13D (N121R), Cuba, NM, Substantial damage. Enroute to airshow. Landed on road. Went off road to avoid collision with auto that stopped.
- [Accident 19750912030649A](https://openairdocs.org/incident/19750912030649A), Sep 12, 1975: Boeing PT13D (N121R), Reno, NV, Substantial damage, 1 fatal. Air show wing walking act,inverted flt.

## 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.

## Earlier aircraft with N121R

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N121R before.

- [Cancelled 1965-05-18](https://openairdocs.org/deregistered/N121R-1965-05-18): Aeroflite Autogyro DGH-1, S/N 1. Owner: [Aeroflite Inc](https://openairdocs.org/faa-owner/AEROFLITE%20INC), [Marion, IL](https://openairdocs.org/faa-place/IL/Marion)

## Related

- Other Boeing PT-13D aircraft: https://openairdocs.org/model/boeing-pt-13d/aircraft.md
- The Pratt & Whitney R1340 series engine: https://openairdocs.org/engine/pratt-whitney-r1340-series.md

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