# N520AA: 1985 Kildall Gary FALCON-XP

- Status: Valid registration
- Airframe: [Kildall Gary FALCON-XP](https://openairdocs.org/model/kildall-gary-falcon-xp) (registry code 05658MX, 2 seats)
- Engine: [Rotax 503 series](https://openairdocs.org/engine/rotax-503-series) (registry code 55564)
- Serial number: 600126
- Year built: 1985
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: July 20, 2009
- Certificate issued: July 28, 2021
- Expires: July 31, 2028
- Mode S code: A688EF
- Registered owner: [Castle Isaac N](https://openairdocs.org/faa-owner/CASTLE%20ISAAC%20N)
- Location: [Springfield, OR](https://openairdocs.org/faa-place/OR/Springfield)
- Owner type: Individual
- Owner's area on the map: 44.0585° N, 123.0116° W: Placed by OpenAirDocs at the center of ZIP code 97477, 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=520AA
- Page: https://openairdocs.org/aircraft/N520AA

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 503 model are included.

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

### Matched by airframe (Kildall Gary FALCON-XP)

None in force.

### Matched by engine (Rotax 503 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N520AA.

## FAA accident and incident reports

None matched to N520AA.

## 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.

## Related

- Other Kildall Gary FALCON-XP aircraft: https://openairdocs.org/model/kildall-gary-falcon-xp/aircraft.md
- The Rotax 503 series engine: https://openairdocs.org/engine/rotax-503-series.md

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