# N521: Adams William U DRAGONFLY, registration cancelled 2012-08-10

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: August 10, 2012
- Status when cancelled: Sale reported, pending cancellation
- Airframe: [Adams William U DRAGONFLY](https://openairdocs.org/model/adams-william-u-dragonfly) (registry code 05675HM)
- Engine: [Lycoming IO-320 series](https://openairdocs.org/engine/lycoming-io-320-series) (registry code 41509)
- Data sheets: [TCDS 1E12](https://openairdocs.org/tcds/1E12) (OpenAirDocs)
- Serial number: G0326007
- Year built: 0
- Type of aircraft: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: October 28, 1996
- Last registry action: April 19, 2005
- Mode S code: A68CA4
- Location: [Xxx, OK](https://openairdocs.org/faa-place/OK/Xxx)
- Owner type: Individual
- The mark today: https://openairdocs.org/aircraft/N521
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=521
- Page: https://openairdocs.org/deregistered/N521-2012-08-10

From the FAA registry file of October 29, 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 Adams William U DRAGONFLY: https://openairdocs.org/model/adams-william-u-dragonfly.md

## Other aircraft with N521

- [Registered now](https://openairdocs.org/aircraft/N521): Airbus Helicopters AS350B3, S/N 9942, built 2026
- [Cancelled 1963-10-29](https://openairdocs.org/deregistered/N521-1963-10-29): Beech D35, S/N D3665. Owner: [Tripp R Richard](https://openairdocs.org/faa-owner/TRIPP%20R%20RICHARD), [Lonpoc, CA](https://openairdocs.org/faa-place/CA/Lonpoc)
- [Cancelled 1947-06-10](https://openairdocs.org/deregistered/N521-1947-06-10): Butler BLACK HAWK, S/N 103. Owner: [Greer Dorris James](https://openairdocs.org/faa-owner/GREER%20DORRIS%20JAMES), [Vicksburg, MS](https://openairdocs.org/faa-place/MS/Vicksburg)

---
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.