# N51WS: Bert-Cassutt IIM, registration cancelled 1979-06-19

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: June 19, 1979
- Exported to: United Kingdom
- Status when cancelled: Valid registration
- Airframe: [Bert-Cassutt IIM](https://openairdocs.org/model/bert-cassutt-iim) (registry code 19704BM)
- Serial number: WLS1
- Type of aircraft: Fixed wing single engine
- Certificate issued: September 10, 1973
- Mode S code: A6611B
- Owner when cancelled: [Sullivan William L](https://openairdocs.org/faa-owner/SULLIVAN%20WILLIAM%20L)
- Location: [Henderson, KY](https://openairdocs.org/faa-place/KY/Henderson)
- Owner type: Individual
- The mark today: https://openairdocs.org/aircraft/N51WS
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=51WS
- Page: https://openairdocs.org/deregistered/N51WS-1979-06-19

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 Bert-Cassutt IIM: https://openairdocs.org/model/bert-cassutt-iim.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 CHI74FEA47](https://openairdocs.org/ntsb/CHI74FEA47), Jun 28, 1974: Cassutt IIM (N51WS), Evansville, IN, substantial damage

## Other aircraft with N51WS

- [Cancelled 2013-06-07](https://openairdocs.org/deregistered/N51WS-2013-06-07): Sullivan William L MONERAI-S, S/N WLS-II, built 1981. Registration expired, pending cancellation. Owner: [Anderson Dennis W](https://openairdocs.org/faa-owner/ANDERSON%20DENNIS%20W), [Derby, KS](https://openairdocs.org/faa-place/KS/Derby)

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