# N611DL: 2023 Sunnyvale AIR GYRO 915

- Status: Valid registration
- Airframe: [Sunnyvale AIR GYRO 915](https://openairdocs.org/model/sunnyvale-air-gyro-915) (registry code 056396X, 2 seats)
- Engine: [Rotax 912ULS series](https://openairdocs.org/engine/rotax-912uls-series) (registry code 55572)
- Serial number: AG915CEN006110119
- Year built: 2023
- Type: Rotorcraft
- Engine type: Reciprocating
- Kit: Airgyro Aviation LLC AG-915 CENTURION
- Airworthiness: Experimental, amateur built
- Airworthiness date: February 27, 2023
- Certificate issued: November 15, 2025
- Expires: November 30, 2032
- Mode S code: A7F2CB
- Registered owners: [De Cook Mark](https://openairdocs.org/faa-owner/DE%20COOK%20MARK), [De Cook Karla](https://openairdocs.org/faa-owner/DE%20COOK%20KARLA)
- Location: [Sully, IA](https://openairdocs.org/faa-place/IA/Sully)
- Owner type: Co-owned
- Owner's area on the map: 41.5669° N, 92.8694° W: Placed by OpenAirDocs at the center of ZIP code 50251, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=611DL
- Page: https://openairdocs.org/aircraft/N611DL

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 912ULS model are included.

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

### Matched by airframe (Sunnyvale AIR GYRO 915)

None in force.

### Matched by engine (Rotax 912ULS series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N611DL.

## FAA accident and incident reports

None matched to N611DL.

## 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)

None matched to this aircraft's models.

## Earlier aircraft with N611DL

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N611DL before.

- [Cancelled 2009-02-18](https://openairdocs.org/deregistered/N611DL-2009-02-18): Boeing 757-232, S/N 22818, built 1985. Owner: [Aar Parts Trading Inc](https://openairdocs.org/faa-owner/AAR%20PARTS%20TRADING%20INC), [Wood Dale, IL](https://openairdocs.org/faa-place/IL/Wood%20Dale)

## Related

- Other Sunnyvale AIR GYRO 915 aircraft: https://openairdocs.org/model/sunnyvale-air-gyro-915/aircraft.md
- The Rotax 912ULS series engine: https://openairdocs.org/engine/rotax-912uls-series.md

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