# N421U: 1968 Cessna 421A, registration cancelled 2012-06-20

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: June 20, 2012
- Status when cancelled: Second renewal notice
- Airframe: [Cessna 421A](https://openairdocs.org/model/cessna-421a) (registry code 2076012)
- Engine: [Continental GTSI0-520-F-K](https://openairdocs.org/engine/continental-gtsi0-520-f-k) (registry code 17031)
- Data sheets: [TCDS A7CE](https://openairdocs.org/tcds/A7CE) (OpenAirDocs)
- Serial number: 421A0012
- Year built: 1968
- Type of aircraft: Fixed wing multi engine
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: December 30, 1968
- Certificate issued: August 4, 1986
- Last registry action: June 15, 2010
- Mode S code: A50118
- Owner when cancelled: [Watertown School District No 14-4](https://openairdocs.org/faa-owner/WATERTOWN%20SCHOOL%20DISTRICT%20NO%2014-4)
- Location: [Watertown, SD](https://openairdocs.org/faa-place/SD/Watertown)
- Owner type: Government
- Owner's area on the map: 44.9367° N, 97.0928° W: Placed by OpenAirDocs at the center of ZIP code 57201, within about 10 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N421U
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=421U
- Page: https://openairdocs.org/deregistered/N421U-2012-06-20

From the FAA registry file of October 28, 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 Cessna 421A: https://openairdocs.org/model/cessna-421a.md

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.