# N90779: Quicksilver MXL II

- Status: Valid registration
- Airframe: [Quicksilver MXL II](https://openairdocs.org/model/quicksilver-mxl-ii) (registry code 059003C, 2 seats)
- Engine: [Rotax 503 DCDI](https://openairdocs.org/engine/rotax-503-dcdi) (registry code 55566)
- Serial number: 796
- Type: Fixed wing single engine
- Engine type: 2 cycle
- Airworthiness: Experimental, registered before 01/31/08
- Airworthiness date: October 29, 2006
- Certificate issued: September 10, 2018
- Expires: September 30, 2028
- Mode S code: AC8C9C
- Registered owner: [Heil William J](https://openairdocs.org/faa-owner/HEIL%20WILLIAM%20J)
- Location: [Marathon, WI](https://openairdocs.org/faa-place/WI/Marathon)
- Owner type: Individual
- Owner's area on the map: 44.9336° N, 89.8305° W: Placed by OpenAirDocs at the center of ZIP code 54448, 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=90779
- Page: https://openairdocs.org/aircraft/N90779

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.

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

### Matched by airframe (Quicksilver MXL II)

None in force.

### Matched by engine (Rotax 503 DCDI)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N90779.

## FAA accident and incident reports

None matched to N90779.

## 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 N90779

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N90779 before.

- [Cancelled 2003-03-04](https://openairdocs.org/deregistered/N90779-2003-03-04): Balloon Works FIREFLY 7, S/N F7-634, built 1990. Triennial form not returned. Owner: [Riverton Rendezvous Inc](https://openairdocs.org/faa-owner/RIVERTON%20RENDEZVOUS%20INC), [Riverton, WY](https://openairdocs.org/faa-place/WY/Riverton)
- [Cancelled 1963-11-04](https://openairdocs.org/deregistered/N90779-1963-11-04): Douglas DC-6A, S/N 44914. Owner: [World Airways Inc](https://openairdocs.org/faa-owner/WORLD%20AIRWAYS%20INC), [Oakland, CA](https://openairdocs.org/faa-place/CA/Oakland)
- [Cancelled (date not recorded)](https://openairdocs.org/deregistered/N90779-undated): Robinson Helicopter R22, S/N 0281

## Related

- Other Quicksilver MXL II aircraft: https://openairdocs.org/model/quicksilver-mxl-ii/aircraft.md
- The Rotax 503 DCDI engine: https://openairdocs.org/engine/rotax-503-dcdi.md

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