| Tail Number / N-Number | N4021D |
| Manufacturer | CESSNA |
| Model | 182A |
| Year Built | 1957 |
| Manufacturer's Serial Number | 34721 |
| 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 | CONT MOTOR |
| Engine Model | O-470 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 230 hp (172 kW) |
| Average Cruising Speed | 119 miles per hour |
| Type of Registrant | LLC |
| Owner Name | 21D LLC |
| Street | 1 RIVERTON WAY |
| City | WEST HENRIETTA |
| State | NY |
| Zip Code | 14586-9754 |
| Region | Eastern |
| County | Monroe County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Certificate Issue Date | 2006-06-26 |
| Last Action Date | 2020-02-20 |
| Expiration Date | 2027-07-31 |
| Status | Valid Registration |
| Mode S Code | 51133216 |
| Mode S Code Hex | A4B68E |