# N28RT: 2001 Tharp Richard CHALLENGER II

- Status: Valid registration
- Airframe: [Tharp Richard CHALLENGER II](https://openairdocs.org/model/tharp-richard-challenger-ii) (registry code 05610EQ, 2 seats)
- Engine: [Rotax 503 series](https://openairdocs.org/engine/rotax-503-series) (registry code 55564)
- Serial number: CH2-0699-1888
- Year built: 2001
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Quad City Ultralight Acft Corp CHALLENGER II
- Airworthiness: Experimental, registered before 01/31/08
- Airworthiness date: November 24, 2008
- Certificate issued: November 25, 2022
- Expires: November 30, 2029
- Mode S code: A2CD2B
- Registered owner: [Luisis Mario](https://openairdocs.org/faa-owner/LUISIS%20MARIO)
- Location: [Webster, FL](https://openairdocs.org/faa-place/FL/Webster)
- Owner type: Individual
- Owner's area on the map: 28.5355° N, 82.0886° W: Placed by OpenAirDocs at the center of ZIP code 33597, within about 7 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=28RT
- Page: https://openairdocs.org/aircraft/N28RT

From the FAA registry file of October 22, 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 (Tharp Richard CHALLENGER II)

None in force.

### Matched by engine (Rotax 503 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N28RT.

## FAA accident and incident reports

None matched to N28RT.

## Reports on N28RT not matched to an aircraft (2)

They name N28RT, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [Accident 19750630021139A](https://openairdocs.org/incident/19750630021139A), Jun 30, 1975: Mooney M20D (N28RT), IL, Destroyed
- [Accident 19750608017409A](https://openairdocs.org/incident/19750608017409A), Jun 8, 1975: Kinner SPORTSTERK (N28RT), Lincoln, IL, Substantial damage. Drg flare for ldg wind gust upset acft.

## 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 N28RT

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N28RT before.

- [Cancelled 1976-05-18](https://openairdocs.org/deregistered/N28RT-1976-05-18): Jeanies Teenie 2, S/N 5-747. Owner: [Taylor Leroy](https://openairdocs.org/faa-owner/TAYLOR%20LEROY), [Clinton, IL](https://openairdocs.org/faa-place/IL/Clinton)

## Related

- Other Tharp Richard CHALLENGER II aircraft: https://openairdocs.org/model/tharp-richard-challenger-ii/aircraft.md
- The Rotax 503 series engine: https://openairdocs.org/engine/rotax-503-series.md

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.