# N503X: Sidney P Essex SR SONEX ONEX

- Status: Valid registration
- Airframe: [Sidney P Essex SR SONEX ONEX](https://openairdocs.org/model/sidney-p-essex-sr-sonex-onex) (registry code 05639M2, 1 seats)
- Serial number: 0167
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Sonex Aircraft LLC ONEX
- Certificate issued: October 5, 2020
- Expires: October 31, 2027
- Mode S code: A64722
- Registered owner: [Essex Sidney P Sr](https://openairdocs.org/faa-owner/ESSEX%20SIDNEY%20P%20SR)
- Location: [Fort Mohave, AZ](https://openairdocs.org/faa-place/AZ/Fort%20Mohave)
- Owner type: Individual
- Owner's area on the map: 35.0134° N, 114.5497° W: Placed by OpenAirDocs at the center of ZIP code 86426, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=503X
- Page: https://openairdocs.org/aircraft/N503X

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 (Sidney P Essex SR SONEX ONEX)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N503X.

## FAA accident and incident reports

None matched to N503X.

## 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 N503X

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N503X before.

- [Cancelled 2013-06-11](https://openairdocs.org/deregistered/N503X-2013-06-11): Digaetano James S JR AIR COMMAND 503, S/N 50300001, built 1987. Registration expired, pending cancellation. Owner: [Digaetano James Jr S](https://openairdocs.org/faa-owner/DIGAETANO%20JAMES%20JR%20S), [Las Vegas, NV](https://openairdocs.org/faa-place/NV/Las%20Vegas)

## Related

- Other Sidney P Essex SR SONEX ONEX aircraft: https://openairdocs.org/model/sidney-p-essex-sr-sonex-onex/aircraft.md

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