# N37261: 1941 Interstate S-1A, registration cancelled 1971-10-28

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: October 28, 1971
- Status when cancelled: Valid registration
- Airframe: [Interstate S-1A](https://openairdocs.org/model/interstate-s-1a) (registry code 1850202)
- Data sheets: [TCDS A-737](https://openairdocs.org/tcds/A-737) (OpenAirDocs)
- Serial number: 104
- Year built: 1941
- Type of aircraft: Fixed wing single engine
- Certificate issued: January 7, 1964
- Mode S code: A43E7D
- Owner when cancelled: [Kuhlmann John W](https://openairdocs.org/faa-owner/KUHLMANN%20JOHN%20W)
- Location: [Billings, MT](https://openairdocs.org/faa-place/MT/Billings)
- Owner type: Individual
- The mark today: https://openairdocs.org/aircraft/N37261
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=37261
- Page: https://openairdocs.org/deregistered/N37261-1971-10-28

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 Interstate S-1A: https://openairdocs.org/model/interstate-s-1a.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 SEA66A0009](https://openairdocs.org/ntsb/SEA66A0009), Aug 8, 1965: Callair S-1A (N37261), 8sw Billings, MT, substantial damage, 1 fatal

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