# N921: 1945 North American/Aero Classics P-51D

- Status: Valid registration
- Airframe: [North American/Aero Classics P-51D](https://openairdocs.org/model/north-american-aero-classics-p-51d) (registry code 6402304, 1 seats)
- Engine: [Pkrd-Roll V1650 series](https://openairdocs.org/engine/pkrd-roll-v1650-series) (registry code 49001)
- Serial number: 45-11507
- Year built: 1945
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Limited
- Airworthiness date: January 9, 1975
- Certificate issued: January 13, 1983
- Expires: April 30, 2029
- Mode S code: ACC1E0
- Registered owner: [Worlds Greatest Aircraft Collection Inc](https://openairdocs.org/faa-owner/WORLDS%20GREATEST%20AIRCRAFT%20COLLECTION%20INC)
- Location: [Polk City, FL](https://openairdocs.org/faa-place/FL/Polk%20City)
- Owner type: Corporation
- Owner's area on the map: 28.2676° N, 81.8538° W: Placed by OpenAirDocs at the center of ZIP code 33868, 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=921
- Page: https://openairdocs.org/aircraft/N921

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 Pkrd-Roll V1650 model are included.

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

### Matched by airframe (North American/Aero Classics P-51D)

None in force.

### Matched by engine (Pkrd-Roll V1650 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N921.

## FAA accident and incident reports

None matched to N921.

## Reports on N921 not matched to an aircraft (2)

They name N921, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [Incident 19810207010019I](https://openairdocs.org/incident/19810207010019I), Feb 7, 1981: Doug DC931 (N921), San Antonio, TX. Za unscheduled landing due to bomb threat.
- [Incident 19800308031539I](https://openairdocs.org/incident/19800308031539I), Mar 8, 1980: Doug DC9 (N921), Chicago, IL. Vibration right side of aircraft above idle power setting. Hose blown off outside of air cycle machine.

## 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.

## Service difficulty reports on N921 not matched to an aircraft (3)

They name N921, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [SDR REXA2019040827390](https://openairdocs.org/sdr/REXA2019040827390), Mar 27, 2019: STRINGER. CORRODED. [ IN REFERENCE NRC 0088 ] INITIAL INSPECTION: CORROSION ON STRINGER 25 RH IN STA. FS= 280 TO FS= 327 AT MAIN AVIONICSCOMPARTMENT. (E/E) [ TASK 900-53-140-300 AP
- [SDR REXA2019040820389](https://openairdocs.org/sdr/REXA2019040820389), Mar 20, 2019: RECEPTACLE. CRACKED. INITIAL INSPECTION: CRACK IN RECEPTACLE PLATE AT FUSELAGE. (FUS)SUMMARY: RECEPTACLE PLATE AT FUSELAGE WAS REPLACED PER SRM 51-42-06-001-001-A01 AND SRM 51-42-20
- [SDR REXA2019040816391](https://openairdocs.org/sdr/REXA2019040816391), Mar 16, 2019: STRINGER SPLICE. CORRODED. CORROSION ON STRINGER SPLICE 25RH IN STA. FS= 327 TO FS= 337 AT MAIN AVIONICS COMPARTMENT. (E/E) [ TASK 900-53-140-300 APPENDIX A ] TCI: 100-09, 100-09E4, 100-0

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Earlier aircraft with N921

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N921 before.

- [Cancelled 1934-07-11](https://openairdocs.org/deregistered/N921-1934-07-11): Waco GXE, S/N 977. Owner: [Hobbie R M Jr](https://openairdocs.org/faa-owner/HOBBIE%20R%20M%20JR), [Montgomery, AL](https://openairdocs.org/faa-place/AL/Montgomery)

## Related

- Other North American/Aero Classics P-51D aircraft: https://openairdocs.org/model/north-american-aero-classics-p-51d/aircraft.md
- The Pkrd-Roll V1650 series engine: https://openairdocs.org/engine/pkrd-roll-v1650-series.md

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