| Tail Number / N-Number | N4421K |
| Manufacturer | RYAN |
| Model | NAVION |
| Year Built | 1948 |
| Manufacturer's Serial Number | NAV-4-1421 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 5 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | E185 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 205 hp (153 kW) |
| Average Cruising Speed | 126 miles per hour |
| Type of Registrant | Individual |
| Owner Name | MARSHALL JAMES O III |
| Street | 4024 PECHIN ST |
| City | PHILADELPHIA |
| State | PA |
| Zip Code | 19128-3622 |
| Region | Eastern |
| County | Philadelphia County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1956-06-16 |
| Certificate Issue Date | 2018-12-10 |
| Last Action Date | 2021-07-26 |
| Expiration Date | 2028-12-31 |
| Status | Valid Registration |
| Mode S Code | 51252220 |
| Mode S Code Hex | A55490 |