# N21AB: Bush PITTS SPECIAL S-1D, registration cancelled 1989-05-18

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: May 18, 1989
- Status when cancelled: Triennial form not returned
- Airframe: [Bush PITTS SPECIAL S-1D](https://openairdocs.org/model/bush-pitts-special-s-1d) (registry code 7221214)
- Serial number: 70144
- Type of aircraft: Fixed wing single engine
- Mode S code: A1B72B
- The mark today: https://openairdocs.org/aircraft/N21AB
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=21AB
- Page: https://openairdocs.org/deregistered/N21AB-1989-05-18

From the FAA registry file of November 3, 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 Bush PITTS SPECIAL S-1D: https://openairdocs.org/model/bush-pitts-special-s-1d.md

## Other aircraft with N21AB

- [Registered now](https://openairdocs.org/aircraft/N21AB): Piper PA-31-350, S/N 31-8052122, built 1980

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