# N81Y: 1933 Stinson JR. SR

- Status: Valid registration
- Airframe: [Stinson JR. SR](https://openairdocs.org/model/stinson-jr-sr) (registry code 8630406, 4 seats)
- Engine: [Lycoming R680-4P-B4](https://openairdocs.org/engine/lycoming-r680-4p-b4) (registry code 41542)
- Data sheets: [TCDS ATC 510](https://openairdocs.org/tcds/ATC%20510) (Consolidated Vultee Aircraft Corporation Stinson Division) (OpenAirDocs)
- Serial number: 8729
- Year built: 1933
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard
- Airworthiness date: June 10, 1950
- Certificate issued: June 14, 2023
- Expires: June 30, 2030
- Mode S code: AB0929
- Registered owner: [Harter Michael R](https://openairdocs.org/faa-owner/HARTER%20MICHAEL%20R)
- Location: [Greenfield, IN](https://openairdocs.org/faa-place/IN/Greenfield)
- Owner type: Individual
- Owner's area on the map: 39.8020° N, 85.7721° W: Placed by OpenAirDocs at the center of ZIP code 46140, within about 7 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=81Y
- Page: https://openairdocs.org/aircraft/N81Y

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Stinson JR. SR)

None in force.

### Matched by engine (Lycoming R680-4P-B4)

None in force.

## Information bulletins (advisory)

None matched.

## 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 CEN21LA343](https://openairdocs.org/ntsb/CEN21LA343), Jul 29, 2021: Stinson JR. SR (N81Y), Ripon, WI, substantial damage. Probable cause: A total loss of engine power due to fuel starvation.

## 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 20210729012099A](https://openairdocs.org/incident/20210729012099A), Jul 29, 2021: Stinson JR. SR (N81Y), Ripon, WI, Substantial damage. On July, 29, 2021 at approximately 1230 CST, while attempting to get to oshkosh (osh) Wisconsin for the [privacy data omitted], a 1933 Stinson Jr. Sr aircraft…

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs) (5)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Stinson JR. SR)

- [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC
- [STC SA01757WI](https://openairdocs.org/stc/SA01757WI): To allow the use of UL91 or UL94 (minimum) grade aviation fuel. Swift Fuels LLC
- [STC SA6070NM](https://openairdocs.org/stc/SA6070NM): Installation of a 'quick-disconnect drain plug' on the engine rocker sump for the oil drain retrieval system after engine shutdown. West Coast Air Creations
- [STC SA00024NY](https://openairdocs.org/stc/SA00024NY): Installation of Airwolf remote mounted engine oil filter kit AFC-K007 on single or multi-engine fixed wing light aircraft incorporating Lycoming reciprocating engines of 450 horsepower or less. Airwolf Filter Corporation
- [STC SA02033AT](https://openairdocs.org/stc/SA02033AT): Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line. M-20 Oil Separators LLC

## Earlier aircraft with N81Y

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N81Y before.

- [Cancelled 1960-03-30](https://openairdocs.org/deregistered/N81Y-1960-03-30): Beech AT-11, S/N 1402, built 1946. Owner: [Congreve Daniel](https://openairdocs.org/faa-owner/CONGREVE%20DANIEL), [Mount Prospect, IL](https://openairdocs.org/faa-place/IL/Mount%20Prospect)

## Related

- Other Stinson JR. SR aircraft: https://openairdocs.org/model/stinson-jr-sr/aircraft.md
- The Lycoming R680-4P-B4 engine: https://openairdocs.org/engine/lycoming-r680-4p-b4.md

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