# N406ZW: 2021 Gary R Arnst AR-1

- Status: Valid registration
- Airframe: [Gary R Arnst AR-1](https://openairdocs.org/model/gary-r-arnst-ar-1) (registry code 05639WT, 2 seats)
- Engine: [Rotax 915 IS series](https://openairdocs.org/engine/rotax-915-is-series) (registry code 55620)
- Data sheets: [TCDS E00051EN](https://openairdocs.org/tcds/E00051EN) (BRP-Rotax GmbH & Co KG) (OpenAirDocs)
- Serial number: 0046
- Year built: 2021
- Type: Rotorcraft
- Engine type: 4 cycle
- Kit: Silverlight Aviation LLC AR-1
- Airworthiness: Experimental, amateur built
- Airworthiness date: March 19, 2021
- Certificate issued: January 13, 2021
- Expires: January 31, 2028
- Mode S code: A4C53F
- Registered owner: [G Amst Farms Inc](https://openairdocs.org/faa-owner/G%20AMST%20FARMS%20INC)
- Location: [Darby, MT](https://openairdocs.org/faa-place/MT/Darby)
- Owner type: Corporation
- Owner's area on the map: 45.7479° N, 114.1629° W: Placed by OpenAirDocs at the center of ZIP code 59829, within about 17 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=406ZW
- Page: https://openairdocs.org/aircraft/N406ZW

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 Rotax 915 IS model are included.

## ADs that may apply (OpenAirDocs): 2 in force

### Matched by airframe (Gary R Arnst AR-1)

None in force.

### Matched by engine (Rotax 915 IS series)

- [AD 2026-04-02](https://openairdocs.org/ad/2026-04-02): Turbine Engine Reduction Gear · BRP-Rotax 915 iSc2 C24 and 915 iSc3 C24. Effective Mar 19, 2026
- [AD 2025-15-03](https://openairdocs.org/ad/2025-15-03): Reciprocating Engine Oil System · BRP-Rotax 912 iSc2 Sport, 912 iSc3 Sport, 915 iSc2 C24 and 1 more. Effective Aug 6, 2025

### Historical (superseded or no longer in force)

- [AD 2025-07-02](https://openairdocs.org/ad/2025-07-02) (historical): Reciprocating Engine Oil System · BRP-Rotax 912 iSc2 Sport, 912 iSc3 Sport, 915 iSc2 C24 and 1 more. Effective Apr 21, 2025

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N406ZW.

## FAA accident and incident reports

None matched to N406ZW.

## 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.

## Service difficulty reports on N406ZW not matched to an aircraft (1)

They name N406ZW, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [SDR A6WA201240539](https://openairdocs.org/sdr/A6WA201240539), Apr 24, 2012: LUG. CHAFED. LT MLG DOOR BELLCRANK PUSH ROD LUG ON DOOR IS CHAFED. REMOVED PUSH ROD, BLENDED CHAFE ON LT MLG DOOR BELL CRANK PUSH ROD LUG FOUND TO BE WITHIN LIMITS, NDT, ALO

## STCs that may be installed (OpenAirDocs) (1)

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 (Rotax 915 IS series)

- [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 915 iSc2 C24

## Related

- Other Gary R Arnst AR-1 aircraft: https://openairdocs.org/model/gary-r-arnst-ar-1/aircraft.md
- The Rotax 915 IS series engine: https://openairdocs.org/engine/rotax-915-is-series.md

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