| Tail Number / N-Number | N84221 |
| Manufacturer | CESSNA |
| Model | 172K |
| Year Built | 1969 |
| Manufacturer's Serial Number | 17258384 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | 0-320 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Average Cruising Speed | 105 miles per hour |
| Type of Registrant | Individual |
| Owner Name | MCKNIGHT MICHAEL D |
| Street | 1563 WOODMORE DR SW |
| City | MARIETTA |
| State | GA |
| Zip Code | 30008-7637 |
| Region | Southern |
| County | Cobb County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1969-06-20 |
| Certificate Issue Date | 2015-11-05 |
| Last Action Date | 2021-11-19 |
| Expiration Date | 2028-11-30 |
| Status | Valid Registration |
| Mode S Code | 52704777 |
| Mode S Code Hex | AB89FF |