| Tail Number / N-Number | N523A |
| Manufacturer | AUSTIN DONALD T |
| Model | GP-4 |
| Manufacturer's Serial Number | 001 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | IO-360-A3B6D |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 200 hp (149 kW) |
| Type of Registrant | Individual |
| Owner Name | AUSTIN DONALD T |
| Street | 1674 RIVER RIDGE CT |
| City | ALLEGAN |
| State | MI |
| Zip Code | 49010-8965 |
| Region | Great Lakes |
| County | Allegan County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2006-05-23 |
| Certificate Issue Date | 2006-03-22 |
| Last Action Date | 2022-07-30 |
| Expiration Date | 2029-10-31 |
| Status | Valid Registration |
| Mode S Code | 51512023 |
| Mode S Code Hex | A69413 |