| Tail Number / N-Number | N321N |
| Manufacturer | BEECH |
| Model | D55 |
| Year Built | 1968 |
| Manufacturer's Serial Number | TE-583 |
| 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 | Individual |
| Owner Name | OATMAN SCOTT A |
| Street | 18520 CAMPBELL RD |
| City | COLORADO SPRINGS |
| State | CO |
| Zip Code | 80908-1206 |
| Region | Northwest Mountain |
| County | El Paso County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1968-06-13 |
| Certificate Issue Date | 2019-12-18 |
| Last Action Date | 2022-08-09 |
| Expiration Date | 2029-12-31 |
| Status | Valid Registration |
| Mode S Code | 50671463 |
| Mode S Code Hex | A37333 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N321N.
| Tail Number / N-Number | N321N |
| Manufacturer | AEROMARINE-KLEMM |
| Model | L-26-A |
| Manufacturer's Serial Number | 2-60 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 67 miles per hour |
| Type of Registrant | Partnership |
| Owner Name | HUBUSH ALBERT P& JOHN BUZZANCO |
| County | El Paso County |
| Last Status | Valid Registration |
| Cancellation Date | 1936-08-15 |