| Tail Number / N-Number | N1421U |
| Manufacturer | CESSNA |
| Model | 421 |
| Year Built | 1967 |
| Manufacturer's Serial Number | 421-0046 |
| 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-C |
| Engine Type | Reciprocating |
| Number of Engines | 2 engines |
| Horsepower per Engine | 340 hp (254 kW) |
| Total Horsepower | 680 hp (507 kW) |
| Average Cruising Speed | 172 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | AVIATION SERVICES OF TN INC |
| Street | 748 AIRPORT RD |
| City | SPARTA |
| State | TN |
| Zip Code | 38583-5239 |
| Region | Central |
| County | White County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1967-12-26 |
| Certificate Issue Date | 2021-10-20 |
| Last Action Date | 2021-10-20 |
| Expiration Date | 2028-10-31 |
| Status | Valid Registration |
| Mode S Code | 50126254 |
| Mode S Code Hex | A0ACAC |