# N9507L: 1972 American AA-1B, registration cancelled 1974-04-24

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: April 24, 1974
- 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-0019
- Year built: 1972
- Type of aircraft: Fixed wing single engine
- Mode S code: AD37FF
- Owner when cancelled: [Helfco Inc](https://openairdocs.org/faa-owner/HELFCO%20INC)
- Location: [Tiburon, CA](https://openairdocs.org/faa-place/CA/Tiburon)
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N9507L
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=9507L
- Page: https://openairdocs.org/deregistered/N9507L-1974-04-24

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 OAK73AP043](https://openairdocs.org/ntsb/OAK73AP043), Jun 4, 1973: Amer Avco AA1-B (N9507L), Fairfield, CA, destroyed, 1 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 19730604016499A](https://openairdocs.org/incident/19730604016499A), Jun 4, 1973: Grumav AA1B (N9507L), Fairfield, CA, Destroyed. Acft placarded-spins prohibited. Plt failed to use estabd spin recovery technique.

## Other aircraft with N9507L

- [Registered now](https://openairdocs.org/aircraft/N9507L): Cessna 172P, S/N 17276566, built 1986

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