# N4750: 2002 Harmening High Flyer 503 DELUXE

- Status: Valid registration
- Airframe: [Harmening High Flyer 503 DELUXE](https://openairdocs.org/model/harmening-high-flyer-503-deluxe) (registry code 05903CO, 2 seats)
- Engine: [Rotax 503 DCDI](https://openairdocs.org/engine/rotax-503-dcdi) (registry code 55566)
- Serial number: 000075
- Year built: 2002
- Type: Weight-shift-control
- Engine type: 2 cycle
- Airworthiness: Experimental, registered before 01/31/08
- Airworthiness date: January 11, 2008
- Certificate issued: August 26, 2013
- Expires: August 31, 2029
- Mode S code: A5D605
- Registered owner: [Farrell Stan](https://openairdocs.org/faa-owner/FARRELL%20STAN)
- Location: [Rockland, ME](https://openairdocs.org/faa-place/ME/Rockland)
- Owner type: Individual
- Owner's area on the map: 44.1349° N, 69.1323° W: Placed by OpenAirDocs at the center of ZIP code 04841, 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=4750
- Page: https://openairdocs.org/aircraft/N4750

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 (Harmening High Flyer 503 DELUXE)

None in force.

### Matched by engine (Rotax 503 DCDI)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N4750.

## FAA accident and incident reports

None matched to N4750.

## 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 N4750

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N4750 before.

- [Cancelled 1996-12-12](https://openairdocs.org/deregistered/N4750-1996-12-12): Boeing 727-235, S/N 19470. Triennial form not returned. Owner: [Aircorp Inc](https://openairdocs.org/faa-owner/AIRCORP%20INC), [Orlando, FL](https://openairdocs.org/faa-place/FL/Orlando)

## Related

- Other Harmening High Flyer 503 DELUXE aircraft: https://openairdocs.org/model/harmening-high-flyer-503-deluxe/aircraft.md
- The Rotax 503 DCDI engine: https://openairdocs.org/engine/rotax-503-dcdi.md

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