| Tail Number / N-Number | N521DM |
| Manufacturer | CESSNA |
| Model | 172L |
| Year Built | 1972 |
| Manufacturer's Serial Number | 17260567 |
| 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 | ALLISON JAMES R |
| Street | 17250 AMBLAIRE RD |
| City | MIDDLEFIELD |
| State | OH |
| Zip Code | 44062-8209 |
| Region | Great Lakes |
| County | Geauga County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1972-05-17 |
| Certificate Issue Date | 1999-06-24 |
| Last Action Date | 2020-04-07 |
| Expiration Date | 2027-08-31 |
| Status | Valid Registration |
| Mode S Code | 51506374 |
| Mode S Code Hex | A68CFC |