| Tail Number / N-Number | N521MC |
| Manufacturer | CESSNA |
| Model | 172S |
| Year Built | 2004 |
| Manufacturer's Serial Number | 172S9730 |
| 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 | IO-360-L2A |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | LLC |
| Owner Name | BARR AIR PATROL LLC |
| Street | 1442 AIRPORT BLVD STE 11 |
| City | MESQUITE |
| State | TX |
| Zip Code | 75181-1339 |
| Region | Southwestern |
| County | Dallas County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2004-11-18 |
| Certificate Issue Date | 2015-08-18 |
| Last Action Date | 2021-03-25 |
| Expiration Date | 2028-08-31 |
| Status | Valid Registration |
| Mode S Code | 51506673 |
| Mode S Code Hex | A68DBB |