| Tail Number / N-Number | N521DD |
| Manufacturer | DIAMOND AIRCRAFT IND INC |
| Model | DA 40 |
| Year Built | 2002 |
| Manufacturer's Serial Number | 40.215 |
| 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 | I0360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | LLC |
| Owner Name | URBANA AVIATION LLC |
| Street | 1900 MCMAHILL RD |
| City | WOODSTOCK |
| State | OH |
| Zip Code | 43084-9607 |
| Region | Great Lakes |
| County | Champaign County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2002-06-21 |
| Certificate Issue Date | 2018-06-07 |
| Last Action Date | 2021-01-20 |
| Expiration Date | 2028-06-30 |
| Status | Valid Registration |
| Mode S Code | 51506364 |
| Mode S Code Hex | A68CF4 |