| Tail Number / N-Number | N321RR |
| Manufacturer | BEECH |
| Model | D55 |
| Year Built | 1968 |
| Manufacturer's Serial Number | TE-520 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | IO 520 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 2 engines |
| Horsepower per Engine | 285 hp (213 kW) |
| Total Horsepower | 570 hp (425 kW) |
| Average Cruising Speed | 165 miles per hour |
| Type of Registrant | Partnership |
| Owner Name | 321 RR LP |
| Street | PO BOX 607 |
| City | WIMBERLEY |
| State | TX |
| Zip Code | 78676-0607 |
| Region | Southwestern |
| County | Hays County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1968-02-07 |
| Certificate Issue Date | 2008-04-08 |
| Last Action Date | 2022-10-20 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 50671616 |
| Mode S Code Hex | A3738E |