# N1SU: 1972 American AA-1B, registration cancelled 1979-05-31

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: May 31, 1979
- Status when cancelled: Valid registration
- Airframe: [American AA-1B](https://openairdocs.org/model/american-aa-1b) (registry code 0630820)
- Data sheets: [TCDS A11EA](https://openairdocs.org/tcds/A11EA) (OpenAirDocs)
- Serial number: AA1B-0004
- Year built: 1972
- Type of aircraft: Fixed wing single engine
- Certificate issued: August 7, 1978
- Mode S code: A001A5
- Owner when cancelled: [Hewison Cecil](https://openairdocs.org/faa-owner/HEWISON%20CECIL)
- Location: [South Lyon, MI](https://openairdocs.org/faa-place/MI/South%20Lyon)
- Owner type: Individual
- Owner's area on the map: 42.4438° N, 83.6569° W: Placed by OpenAirDocs at the center of ZIP code 48178, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N1SU
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=1SU
- Page: https://openairdocs.org/deregistered/N1SU-1979-05-31

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 American AA-1B: https://openairdocs.org/model/american-aa-1b.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 CHI78FEC45](https://openairdocs.org/ntsb/CHI78FEC45), Aug 4, 1978: Grum Amer AA1-B (N1SU), Milford, MI, destroyed

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 19780804025669A](https://openairdocs.org/incident/19780804025669A), Aug 4, 1978: Grumav AA1B (N1SU), Milford, MI, Destroyed. Entered flat spin from a split-s maneuver.

## Other aircraft with N1SU

- [Cancelled 2003-01-09](https://openairdocs.org/deregistered/N1SU-2003-01-09): Beech V35B, S/N D-9548, built 1973. Triennial form not returned. Owner: [Payne Jerry L](https://openairdocs.org/faa-owner/PAYNE%20JERRY%20L), [Baton Rouge, LA](https://openairdocs.org/faa-place/LA/Baton%20Rouge)
- [Cancelled 1972-07-20](https://openairdocs.org/deregistered/N1SU-1972-07-20): American AA-1A, S/N 287. Owner: [North Dakota State University Club](https://openairdocs.org/faa-owner/NORTH%20DAKOTA%20STATE%20UNIVERSITY%20CLUB), [Fargo, ND](https://openairdocs.org/faa-place/ND/Fargo)

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