| Tail Number / N-Number | N421EQ |
| Manufacturer | CESSNA |
| Model | 421C |
| Manufacturer's Serial Number | 421C0910 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 8 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | GTSIO-520 SER |
| Engine Type | Reciprocating |
| Number of Engines | 2 engines |
| Horsepower per Engine | 300 hp (224 kW) |
| Total Horsepower | 600 hp (448 kW) |
| Average Cruising Speed | 90 miles per hour |
| Type of Registrant | LLC |
| Owner Name | EQUUS AIR LLC |
| Street | PO BOX 5351 |
| City | NORMAN |
| State | OK |
| Zip Code | 73070-5351 |
| Region | Southwestern |
| County | Cleveland County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1996-07-11 |
| Certificate Issue Date | 2020-01-28 |
| Last Action Date | 2022-08-27 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 51177711 |
| Mode S Code Hex | A4FFC9 |