# N62990: 1971 Operation Sigma SIGMA PROTOYPE GLDR, registration cancelled 2019-11-04

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: November 4, 2019
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Operation Sigma SIGMA PROTOYPE GLDR](https://openairdocs.org/model/operation-sigma-sigma-protoype-gldr) (registry code 05606ZO)
- Engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000)
- Serial number: 003
- Year built: 1971
- Type of aircraft: Glider
- Engine type: None
- Airworthiness: Experimental, exhibition, racing
- Airworthiness date: August 23, 1999
- Certificate issued: July 26, 2016
- Last registry action: July 26, 2016
- Mode S code: A83B58
- Owners when cancelled: [Osoba William G Jr](https://openairdocs.org/faa-owner/OSOBA%20WILLIAM%20G%20JR), [Osoba Christine S](https://openairdocs.org/faa-owner/OSOBA%20CHRISTINE%20S)
- Location: [Tijeras, NM](https://openairdocs.org/faa-place/NM/Tijeras)
- Owner type: Co-owned
- Owner's area on the map: 34.9968° N, 106.3006° W: Placed by OpenAirDocs at the center of ZIP code 87059, within about 7 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N62990
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=62990
- Page: https://openairdocs.org/deregistered/N62990-2019-11-04

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 Operation Sigma SIGMA PROTOYPE GLDR: https://openairdocs.org/model/operation-sigma-sigma-protoype-gldr.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.