# N9976U: 1978 Grumman American Avn. AA-1C, registration cancelled 1979-01-10

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: January 10, 1979
- Status when cancelled: Valid registration
- Airframe: [Grumman American Avn. AA-1C](https://openairdocs.org/model/grumman-american-avn-aa-1c) (registry code 3960100)
- Data sheets: [TCDS A11EA](https://openairdocs.org/tcds/A11EA) (OpenAirDocs)
- Serial number: AA1B0171
- Year built: 1978
- Type of aircraft: Fixed wing single engine
- Certificate issued: August 23, 1978
- Mode S code: ADEFE1
- Owner when cancelled: [Wausau Aero Inc](https://openairdocs.org/faa-owner/WAUSAU%20AERO%20INC)
- Location: [Wausau, WI](https://openairdocs.org/faa-place/WI/Wausau)
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N9976U
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=9976U
- Page: https://openairdocs.org/deregistered/N9976U-1979-01-10

From the FAA registry file of November 4, 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 Grumman American Avn. AA-1C: https://openairdocs.org/model/grumman-american-avn-aa-1c.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 CHI78FEP64](https://openairdocs.org/ntsb/CHI78FEP64), Aug 30, 1978: Grumman AA-1C (N9976U), Laona, WI, destroyed, 2 fatal

## 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 19780830040069A](https://openairdocs.org/incident/19780830040069A), Aug 30, 1978: Gulstm AA5 (N9976U), Laona, WI, Destroyed, 1 fatal. 5 In. High grass r/w.acft 67LBS over certificated gross weight.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.