| Tail Number / N-Number | N51XZ |
| Manufacturer | MILLARD RICHARD N |
| Model | S 51 D |
| Year Built | 2004 |
| Manufacturer's Serial Number | 116 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | AMA/EXPR |
| Engine Model | UNKNOWN ENG |
| Number of Engines | 1 engine |
| Kit Manufacturer | STEWART 51 INC |
| Kit Model | P-51D |
| Type of Registrant | Individual |
| Owner Name | MILLARD JUDY A |
| Street | 126 CHATHAM LN |
| City | CROSSVILLE |
| State | TN |
| Zip Code | 38558-2628 |
| Region | Central |
| County | Cumberland County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2004-03-30 |
| Certificate Issue Date | 2016-11-08 |
| Last Action Date | 2022-08-09 |
| Expiration Date | 2029-11-30 |
| Status | Valid Registration |
| Mode S Code | 51460473 |
| Mode S Code Hex | A6613B |