# N3685: 1971 Browing BENSEN B-8M, registration cancelled 2017-11-18

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: November 18, 2017
- Status when cancelled: Revoked, canceled
- Airframe: [Browing BENSEN B-8M](https://openairdocs.org/model/browing-bensen-b-8m) (registry code 1300514)
- Engine: [Mcculloch 4318A&E/0-100](https://openairdocs.org/engine/mcculloch-4318a-e-0-100) (registry code 43101)
- Serial number: 517
- Year built: 1971
- Type of aircraft: Rotorcraft
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Last registry action: January 14, 1977
- Mode S code: A42D0B
- Owner when cancelled: [Halvorson Gregory D](https://openairdocs.org/faa-owner/HALVORSON%20GREGORY%20D)
- Location: [Mcchord Afb, WA](https://openairdocs.org/faa-place/WA/Mcchord%20Afb)
- Owner type: Individual
- Owner's area on the map: 47.1350° N, 122.4921° W: Placed by OpenAirDocs at the center of ZIP code 98438, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N3685
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=3685
- Page: https://openairdocs.org/deregistered/N3685-2017-11-18

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 Browing BENSEN B-8M: https://openairdocs.org/model/browing-bensen-b-8m.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 SEA73FYE07](https://openairdocs.org/ntsb/SEA73FYE07), Jul 20, 1972: Bensen B8M (N3685), Olympia, WA, substantial damage

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