# N5991X: Brantly B-2, registration cancelled 1966-02-23

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: February 23, 1966
- Status when cancelled: Valid registration
- Airframe: [Brantly B-2](https://openairdocs.org/model/brantly-b-2) (registry code 1440502)
- Data sheets: [TCDS 2H2](https://openairdocs.org/tcds/2H2) (OpenAirDocs)
- Serial number: 135
- Type of aircraft: Rotorcraft
- Certificate issued: October 13, 1964
- Mode S code: A7C167
- Owner when cancelled: [Ridonlee Copter](https://openairdocs.org/faa-owner/RIDONLEE%20COPTER)
- Location: [Bigfork, MT](https://openairdocs.org/faa-place/MT/Bigfork)
- Owner type: Individual
- The mark today: https://openairdocs.org/aircraft/N5991X
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=5991X
- Page: https://openairdocs.org/deregistered/N5991X-1966-02-23

From the FAA registry file of November 5, 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 Brantly B-2: https://openairdocs.org/model/brantly-b-2.md

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB SEA66A0030](https://openairdocs.org/ntsb/SEA66A0030), Nov 3, 1965: Brantly B-2 (N5991X), Bigfork, MT, destroyed

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