# N456GR: 2011 Robert Richardson CUERVO-6H1

- Status: Valid registration
- Airframe: [Robert Richardson CUERVO-6H1](https://openairdocs.org/model/robert-richardson-cuervo-6h1) (registry code 05631CM, 3 seats)
- Engine: [Franklin 6V-335 series](https://openairdocs.org/engine/franklin-6v-335-series) (registry code 27039)
- Data sheets: [TCDS E-244](https://openairdocs.org/tcds/E-244) (Franklin Sp. z.o.o.) (OpenAirDocs)
- Serial number: 28229-1
- Year built: 2011
- Type: Rotorcraft
- Engine type: Reciprocating
- Airworthiness: Experimental, exhibition
- Airworthiness date: June 13, 2012
- Certificate issued: November 17, 2011
- Expires: November 30, 2027
- Mode S code: A5890C
- Registered owner: [R & L Heli Aviation LLC](https://openairdocs.org/faa-owner/R%20%26%20L%20HELI%20AVIATION%20LLC)
- Location: [Boynton Beach, FL](https://openairdocs.org/faa-place/FL/Boynton%20Beach)
- Owner type: LLC
- Owner's area on the map: 26.5258° N, 80.0614° W: Placed by OpenAirDocs at the center of ZIP code 33435, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=456GR
- Page: https://openairdocs.org/aircraft/N456GR

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 (Robert Richardson CUERVO-6H1)

None in force.

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

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N456GR.

## FAA accident and incident reports

None matched to N456GR.

## 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 Robert Richardson CUERVO-6H1 aircraft: https://openairdocs.org/model/robert-richardson-cuervo-6h1/aircraft.md
- The Franklin 6V-335 series engine: https://openairdocs.org/engine/franklin-6v-335-series.md

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