# N9685M: 1967 Mooney M20C, registration cancelled 1977-07-25

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: July 25, 1977
- Status when cancelled: Valid registration
- Airframe: [Mooney M20C](https://openairdocs.org/model/mooney-m20c) (registry code 5870208)
- Data sheets: [TCDS 2A3](https://openairdocs.org/tcds/2A3) (OpenAirDocs)
- Serial number: 670021
- Year built: 1967
- Type of aircraft: Fixed wing single engine
- Certificate issued: December 3, 1976
- Mode S code: AD7CF1
- Owner when cancelled: [Hellthaler Arno](https://openairdocs.org/faa-owner/HELLTHALER%20ARNO)
- Location: [Oak Park, MI](https://openairdocs.org/faa-place/MI/Oak%20Park)
- Owner type: Individual
- Owner's area on the map: 42.4649° N, 83.1824° W: Placed by OpenAirDocs at the center of ZIP code 48237, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N9685M
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=9685M
- Page: https://openairdocs.org/deregistered/N9685M-1977-07-25

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 Mooney M20C: https://openairdocs.org/model/mooney-m20c.md

## NTSB investigations (2)

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 DEN77FA039](https://openairdocs.org/ntsb/DEN77FA039), May 1, 1977: Mooney M20C (N9685M), Silver Plume, CO, destroyed, 1 fatal
- [NTSB CHI68D0305](https://openairdocs.org/ntsb/CHI68D0305), Sep 5, 1967: Mooney 20C (N9685M), Park Falls, WI, 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 19770501012139A](https://openairdocs.org/incident/19770501012139A), May 1, 1977: Mooney M20C (N9685M), Silver Plume, CO, Destroyed. Autopsy revealed mild encephalitis in brain tissue.

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