# N9520U: 1977 Grumman American Avn. AA-1C, registration cancelled 2014-11-24

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: November 24, 2014
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Grumman American Avn. AA-1C](https://openairdocs.org/model/grumman-american-avn-aa-1c) (registry code 3960100)
- Engine: [Lycoming 0-235 series](https://openairdocs.org/engine/lycoming-0-235-series) (registry code 41505)
- Data sheets: [TCDS A11EA](https://openairdocs.org/tcds/A11EA), [TCDS E-223](https://openairdocs.org/tcds/E-223) (OpenAirDocs)
- Serial number: AA1C0014
- Year built: 1977
- Type of aircraft: Fixed wing single engine
- Engine type: 4 cycle
- Airworthiness: Standard, utility
- Airworthiness date: February 28, 1977
- Certificate issued: January 8, 1986
- Last registry action: April 29, 2003
- Mode S code: AD3E80
- Owners when cancelled: [Thomason David W](https://openairdocs.org/faa-owner/THOMASON%20DAVID%20W), [Thomason Billie E](https://openairdocs.org/faa-owner/THOMASON%20BILLIE%20E), [Thomason Wilma J](https://openairdocs.org/faa-owner/THOMASON%20WILMA%20J)
- Location: [Quartz Hill, CA](https://openairdocs.org/faa-place/CA/Quartz%20Hill)
- Owner type: Co-owned
- Owner's area on the map: 34.7177° N, 118.1523° W: Placed by OpenAirDocs at the center of ZIP code 93534, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N9520U
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=9520U
- Page: https://openairdocs.org/deregistered/N9520U-2014-11-24

From the FAA registry file of November 3, 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 CHI79DEE41](https://openairdocs.org/ntsb/CHI79DEE41), Feb 10, 1979: Grumman AA1C (N9520U), Plainfield, IL, substantial damage

## 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 19790211002649A](https://openairdocs.org/incident/19790211002649A), Feb 11, 1979: Gulstm AA1C (N9520U), Plainfield, IL, Substantial damage. Student pilot lost directional control on landing.

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