# N721US: Boeing 720-051B, registration cancelled 1971-11-23

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: November 23, 1971
- Exported to: United Kingdom
- Status when cancelled: Valid registration
- Airframe: [Boeing 720-051B](https://openairdocs.org/model/boeing-720-051b) (registry code 1383861)
- Serial number: 18351
- Type of aircraft: Fixed wing multi engine
- Certificate issued: June 23, 1961
- Mode S code: A9A916
- Owner when cancelled: [Northwest Airlines Inc](https://openairdocs.org/faa-owner/NORTHWEST%20AIRLINES%20INC)
- Location: [St Paul, MN](https://openairdocs.org/faa-place/MN/St%20Paul)
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N721US
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=721US
- Page: https://openairdocs.org/deregistered/N721US-1971-11-23

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 Boeing 720-051B: https://openairdocs.org/model/boeing-720-051b.md

## Other aircraft with N721US

- [Registered now](https://openairdocs.org/aircraft/N721US): Aerostar International S-60A, S/N S60A-3233, built 1997
- [Cancelled 1994-08-25](https://openairdocs.org/deregistered/N721US-1994-08-25): Boeing 727-214, S/N 20165. Triennial form not returned. Owner: [Dallas Aerospace Inc](https://openairdocs.org/faa-owner/DALLAS%20AEROSPACE%20INC), [Flower Mound, TX](https://openairdocs.org/faa-place/TX/Flower%20Mound)

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