# N20BB: 1971 Sportavia-Putzer SFS31, registration cancelled 2012-07-24

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: July 24, 2012
- Status when cancelled: Sale reported, pending cancellation
- Airframe: [Sportavia-Putzer SFS31](https://openairdocs.org/model/sportavia-putzer-sfs31) (registry code 8451018)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Serial number: 6607
- Year built: 1971
- Type of aircraft: Glider
- Airworthiness: Experimental, exhibition
- Airworthiness date: January 5, 1980
- Last registry action: December 19, 1991
- Mode S code: A18FC5
- Location: [Cambridge, MA](https://openairdocs.org/faa-place/MA/Cambridge)
- Owner type: Individual
- Owner's area on the map: 42.3624° N, 71.1023° W: Placed by OpenAirDocs at the center of ZIP code 02139, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N20BB
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=20BB
- Page: https://openairdocs.org/deregistered/N20BB-2012-07-24

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 Sportavia-Putzer SFS31: https://openairdocs.org/model/sportavia-putzer-sfs31.md

## Other aircraft with N20BB

- [Registered now](https://openairdocs.org/aircraft/N20BB): Piper PA 31P 350, S/N 31P-8414005, built 1983

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