Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N4221K.
| Tail Number / N-Number | N4221K |
| Manufacturer | RYAN |
| Model | NAVION |
| Manufacturer's Serial Number | NAV-4-1221 |
| 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) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 126 miles per hour |
| Type of Registrant | Individual |
| Owner Name | RIEDLINGER CARL J |
| Street | PO BOX 374 |
| City | SMITHTOWN |
| State | NY |
| Zip Code | 11787 |
| Region | Eastern |
| Certificate Issue Date | 1957-10-29 |
| Last Status | Valid Registration |
| Cancellation Date | 1965-05-12 |
| Mode S Code | 51202622 |
| Mode S Code Hex | A50592 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N4221K.
| Tail Number / N-Number | N4221K |
| Manufacturer | MCKENNA HUGH E |
| Model | CHARGER MA-5 |
| Manufacturer's Serial Number | 207 |
| 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) |
| Number of Engines | 1 engine |
| Last Action Date | 1981-02-07 |
| Last Status | N-Number assigned, has not been registered and is pending cancellation |
| Cancellation Date | 2011-03-02 |
| Mode S Code | 51202622 |
| Mode S Code Hex | A50592 |