# N17129: 1951 Hiller OH-23B

- Status: Valid registration
- Airframe: [Hiller OH-23B](https://openairdocs.org/model/hiller-oh-23b) (registry code 4360109, 4 seats)
- Engine: [Franklin 6V-335 series](https://openairdocs.org/engine/franklin-6v-335-series) (registry code 27039)
- Data sheets: [TCDS 6H2](https://openairdocs.org/tcds/6H2) (Siam Hiller Holdings Inc.), [TCDS E-244](https://openairdocs.org/tcds/E-244) (Franklin Sp. z.o.o.) (OpenAirDocs)
- Serial number: 51-16189
- Year built: 1951
- Type: Rotorcraft
- Engine type: Reciprocating
- Airworthiness: Standard, normal, utility
- Airworthiness date: June 23, 1983
- Certificate issued: May 8, 2014
- Expires: May 31, 2027
- Mode S code: A11FA4
- Registered owner: [Dreyer Elwain C](https://openairdocs.org/faa-owner/DREYER%20ELWAIN%20C)
- Location: [Cardington, OH](https://openairdocs.org/faa-place/OH/Cardington)
- Owner type: Individual
- Owner's area on the map: 40.4840° N, 82.8744° W: Placed by OpenAirDocs at the center of ZIP code 43315, within about 5 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=17129
- Page: https://openairdocs.org/aircraft/N17129

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. The registry lists only the engine series, so ADs for every Franklin 6V-335 model are included.

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

### Matched by airframe (Hiller OH-23B)

None in force.

### Matched by engine (Franklin 6V-335 series)

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 NYC85FGM02](https://openairdocs.org/ntsb/NYC85FGM02), Nov 15, 1984: Hiller UH-12B (N17129), Butler, PA, 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 19841115062119A](https://openairdocs.org/incident/19841115062119A), Nov 15, 1984: Hiller H23B (N17129), Butler, PA, Substantial damage. No fuel at practice airport. Elected to return to home base upwind. Ran out of fuel a mile short. Landed in trees.

## 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 engine (Franklin 6V-335 series)

- [STC SE04651CH](https://openairdocs.org/stc/SE04651CH): To allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22. Swift Fuels LLC. Lists 6V-335-A
- [STC SE2932SW](https://openairdocs.org/stc/SE2932SW): Install carburetor air temperature indicator. Approved for Aircooled Motors (Franklin Engine Co.) equipped with float carburetors. Model eligibility included here may not be inclusive. Alcor LLC. Lists 6V-335-A
- [STC SE1311SO](https://openairdocs.org/stc/SE1311SO): Installation of Shivers carburetor temperature gauge with a Richter Aero Equipment B-5 carburetor temperature probe. LegacySTC.com. Lists 6V-335-A
- [STC SE03309CH](https://openairdocs.org/stc/SE03309CH): Installation of Engine Preheat Kit, p/n TSP6CYL-2927-115 for 115 volt application. Hartzell Propeller Inc. Lists 6V-335-A
- [STC SE01966WI](https://openairdocs.org/stc/SE01966WI): Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines. General Aviation Modifications Inc. Lists 6V-335-A

## Related

- Other Hiller OH-23B aircraft: https://openairdocs.org/model/hiller-oh-23b/aircraft.md
- The Franklin 6V-335 series engine: https://openairdocs.org/engine/franklin-6v-335-series.md

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