# N44600: 2005 Harper Donald Q HI-MAX 1400

- Status: Valid registration
- Airframe: [Harper Donald Q HI-MAX 1400](https://openairdocs.org/model/harper-donald-q-hi-max-1400) (registry code 05619XD, 1 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Serial number: 001
- Year built: 2005
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: August 1, 2005
- Certificate issued: July 8, 2005
- Expires: November 30, 2027
- Mode S code: A56358
- Registered owner: [Harper Donald Q](https://openairdocs.org/faa-owner/HARPER%20DONALD%20Q)
- Location: [Williston, SC](https://openairdocs.org/faa-place/SC/Williston)
- Owner type: Individual
- Owner's area on the map: 33.3992° N, 81.4318° W: Placed by OpenAirDocs at the center of ZIP code 29853, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=44600
- Page: https://openairdocs.org/aircraft/N44600

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 (Harper Donald Q HI-MAX 1400)

None in force.

### Matched by engine (Amateur-built UNKNOWN ENG)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N44600.

## FAA accident and incident reports

None matched to N44600.

## 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 N44600

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N44600 before.

- [Cancelled 1997-08-27](https://openairdocs.org/deregistered/N44600-1997-08-27): Nietz Donald H TIERRA TWO, S/N DHN0183. Triennial form not returned. Owner: [Nietz Donald H](https://openairdocs.org/faa-owner/NIETZ%20DONALD%20H), [Zumbro Falls, MN](https://openairdocs.org/faa-place/MN/Zumbro%20Falls)
- [Cancelled 1976-04-20](https://openairdocs.org/deregistered/N44600-1976-04-20): Piper PA-28-235, S/N 28-7410099, built 1974. Owner: [House Woodrow B](https://openairdocs.org/faa-owner/HOUSE%20WOODROW%20B), [Albuquerque, NM](https://openairdocs.org/faa-place/NM/Albuquerque)

## Related

- Other Harper Donald Q HI-MAX 1400 aircraft: https://openairdocs.org/model/harper-donald-q-hi-max-1400/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.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.