# N728H: 2017 Middleton Ben H TXP 503

- Status: Valid registration
- Airframe: [Middleton Ben H TXP 503](https://openairdocs.org/model/middleton-ben-h-txp-503) (registry code 05635WM, 1 seats)
- Engine: [Rotax 503 series](https://openairdocs.org/engine/rotax-503-series) (registry code 55564)
- Serial number: 4-8169728H
- Year built: 2017
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: June 13, 2017
- Certificate issued: February 17, 2023
- Expires: February 28, 2030
- Mode S code: A9C1F3
- Registered owner: [Middleton Ben H](https://openairdocs.org/faa-owner/MIDDLETON%20BEN%20H)
- Location: [Sierra Vista, AZ](https://openairdocs.org/faa-place/AZ/Sierra%20Vista)
- Owner type: Individual
- Owner's area on the map: 31.5531° N, 110.1711° W: Placed by OpenAirDocs at the center of ZIP code 85635, 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=728H
- Page: https://openairdocs.org/aircraft/N728H

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 (Middleton Ben H TXP 503)

None in force.

### Matched by engine (Rotax 503 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N728H.

## FAA accident and incident reports

None matched to N728H.

## 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 N728H

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N728H before.

- [Cancelled 2010-07-08](https://openairdocs.org/deregistered/N728H-2010-07-08): Bell 206L-3, S/N 51553, built 1992. Exported to Colombia. Owner: [Gm Leasing Company LLC](https://openairdocs.org/faa-owner/GM%20LEASING%20COMPANY%20LLC), [Broussard, LA](https://openairdocs.org/faa-place/LA/Broussard)

## Related

- Other Middleton Ben H TXP 503 aircraft: https://openairdocs.org/model/middleton-ben-h-txp-503/aircraft.md
- The Rotax 503 series engine: https://openairdocs.org/engine/rotax-503-series.md

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