# N64491: 1973 Hartmaier THORP T-18

- Status: Valid registration
- Airframe: [Hartmaier THORP T-18](https://openairdocs.org/model/hartmaier-thorp-t-18) (registry code 8951034, 2 seats)
- Serial number: 573
- Year built: 1973
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Certificate issued: August 13, 1982
- Expires: January 31, 2028
- Mode S code: A877C4
- Registered owner: [Hartmaier Robert S Jr](https://openairdocs.org/faa-owner/HARTMAIER%20ROBERT%20S%20JR)
- Location: [Monroe Township, NJ](https://openairdocs.org/faa-place/NJ/Monroe%20Township)
- Owner type: Individual
- Owner's area on the map: 40.3348° N, 74.4328° W: Placed by OpenAirDocs at the center of ZIP code 08831, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=64491
- Page: https://openairdocs.org/aircraft/N64491

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 (Hartmaier THORP T-18)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N64491.

## FAA accident and incident reports

None matched to N64491.

## 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 N64491

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N64491 before.

- [Cancelled 1951-05-02](https://openairdocs.org/deregistered/N64491-1951-05-02): Cessna T-50, S/N 4721. Owner: [M&M Aircraft Service](https://openairdocs.org/faa-owner/M%26M%20AIRCRAFT%20SERVICE), [Wichita, KS](https://openairdocs.org/faa-place/KS/Wichita)

## Related

- Other Hartmaier THORP T-18 aircraft: https://openairdocs.org/model/hartmaier-thorp-t-18/aircraft.md

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