# N5GT: 1997 Groelz WITTMAN TAILWIND W-8

- Status: Valid registration
- Airframe: [Groelz WITTMAN TAILWIND W-8](https://openairdocs.org/model/groelz-wittman-tailwind-w-8) (registry code 9790804, 2 seats)
- Engine: [Franklin 6A4150 series](https://openairdocs.org/engine/franklin-6a4150-series) (registry code 27024)
- Data sheets: [TCDS E-238](https://openairdocs.org/tcds/E-238) (Franklin Sp. z.o.o.) (OpenAirDocs)
- Serial number: 195
- Year built: 1997
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: September 17, 1997
- Certificate issued: April 23, 2019
- Expires: April 30, 2029
- Mode S code: A635E6
- Registered owner: [Meyers Mark R](https://openairdocs.org/faa-owner/MEYERS%20MARK%20R)
- Location: [Ocean Shores, WA](https://openairdocs.org/faa-place/WA/Ocean%20Shores)
- Owner type: Individual
- Owner's area on the map: 46.9939° N, 124.1410° W: Placed by OpenAirDocs at the center of ZIP code 98569, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=5GT
- Page: https://openairdocs.org/aircraft/N5GT

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 6A4150 model are included.

## ADs that may apply (OpenAirDocs): 4 in force

### Matched by airframe (Groelz WITTMAN TAILWIND W-8)

None in force.

### Matched by engine (Franklin 6A4150 series)

- [AD 96-02-04](https://openairdocs.org/ad/96-02-04): 80 Octane Avgas · Wytwornia Sprzetu Komunikacyjnego 6A4-150-B3 and 6A4-165-B3. Effective Feb 13, 1996
- [AD 69-09-01](https://openairdocs.org/ad/69-09-01): Eisemann Magnetos · Eisemann Magnetos, 2A4-45-B2, 2A4-49-B2 and 158 more
- [AD 48-50-01](https://openairdocs.org/ad/48-50-01): Cylinder Base Flange · Wytwornia Sprzetu Komunikacyjnego 6A4-150-B3 and 6A4-150-B31
- [AD 48-21-01](https://openairdocs.org/ad/48-21-01): Accelerator Pump Linkage · Wytwornia Sprzetu Komunikacyjnego 6A4-150-B3 and 6A4-150-B31

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N5GT.

## FAA accident and incident reports

None matched to N5GT.

## 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) (16)

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 6A4150 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 6A4-150-B3
- [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 6A4-150-B3
- [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 6A4-150-B3
- [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 6A4-150-B3
- [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 6A4-150-B3
- [STC SE4178NM](https://openairdocs.org/stc/SE4178NM): Installation of oil filter kit. Franklin Aircraft Engines Inc. Lists 6A4-150-B3
- [STC SE1673CE](https://openairdocs.org/stc/SE1673CE): Replace camshaft and valve train with parts from Model 6A4-165-B3 engine. David James. Lists 6A4-150-B3
- [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc. Lists 6A4-150-B3
- [STC SE3331NM](https://openairdocs.org/stc/SE3331NM): Lycoming valve cover gasket. Real Gaskets Tennessee. Lists 6A4-150-B3
- [STC SE110CH](https://openairdocs.org/stc/SE110CH): Installation of Slick Model 6399 magnetos. Champion Aerospace LLC. Lists 6A4-150-B3
- [STC SE1-201](https://openairdocs.org/stc/SE1-201): Installation of the Richter Aero Equipment Type B-4 or B-5 Temperature Probe. (O-360 SERIES (excl. A1C, C2B, C2D)). MidContinent Instru Co Inc. Lists 6A4-150-B3
- [STC SE1696GL](https://openairdocs.org/stc/SE1696GL): Installation of nose seal retainer. Skaggs Robert G. Lists 6A4-150-B3
- [STC SE2127CE](https://openairdocs.org/stc/SE2127CE): Add the following approved fuel unleaded automotive gasoline, 87 minimum antiknock index and leaded automotive gasoline, 88 minimum antiknock index (RON+MON)/2. Intermixing with aviation gasoline also approved. Petersen Aviation Inc. Lists 6A4-150-B3
- [STC SE61WE](https://openairdocs.org/stc/SE61WE): SERIAL NUMBER 12434 ONLY: Installation of modified Franklin Part Non. 19182 dual magneto/vacuum pump drive. Satisfactory for Franklin Model 6A4-150-B3 engine, Serial No. 12434 only. G.C. Schinneller. Lists 6A4-150-B3
- [STC SE59WE](https://openairdocs.org/stc/SE59WE): SERIAL NUMBER 11514 ONLY: Installation of modified Franklin Part No. 19182 dual magneto/vacuum pump drive. John W. German. Lists 6A4-150-B3
- [STC SE4-1192](https://openairdocs.org/stc/SE4-1192): Adapter to permit Bendix Scintilla magneto installation, Type SF6LN-8, and modification of carburetor- manifold adapter box. Van De Water Devel Co. Lists 6A4-150-B3

## Related

- Other Groelz WITTMAN TAILWIND W-8 aircraft: https://openairdocs.org/model/groelz-wittman-tailwind-w-8/aircraft.md
- The Franklin 6A4150 series engine: https://openairdocs.org/engine/franklin-6a4150-series.md

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