# N521K: Lockheed 3 AIR EXPRESS, registration cancelled 1930-07-22

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: July 22, 1930
- Status when cancelled: Valid registration
- Airframe: [Lockheed 3 AIR EXPRESS](https://openairdocs.org/model/lockheed-3-air-express) (registry code 5261103)
- Serial number: 91
- Type of aircraft: Fixed wing single engine
- Certificate issued: July 27, 1929
- Mode S code: A68D86
- Owner when cancelled: [Lockheed Aircraft Corp](https://openairdocs.org/faa-owner/LOCKHEED%20AIRCRAFT%20CORP)
- Location: [Burbank, CA](https://openairdocs.org/faa-place/CA/Burbank)
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N521K
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=521K
- Page: https://openairdocs.org/deregistered/N521K-1930-07-22

From the FAA registry file of November 4, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Lockheed 3 AIR EXPRESS: https://openairdocs.org/model/lockheed-3-air-express.md

## Other aircraft with N521K

- [Registered now](https://openairdocs.org/aircraft/N521K): Great Lakes/Fritz Joe 2T-1A-2, S/N 2JF, built 1998

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