| Tail Number / N-Number | N639SC |
| Manufacturer | CESSNA |
| Model | 421A |
| Year Built | 1969 |
| Manufacturer's Serial Number | 421A0102 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 7 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 | LLC |
| Owner Name | DALLAS AVIATION LLC |
| Street | 1744 E 26TH PL |
| City | YUMA |
| State | AZ |
| Zip Code | 85365-3124 |
| Region | Western-Pacific |
| County | Yuma County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1969-06-18 |
| Certificate Issue Date | 2013-12-05 |
| Last Action Date | 2022-10-13 |
| Expiration Date | 2029-12-31 |
| Status | Valid Registration |
| Mode S Code | 52060276 |
| Mode S Code Hex | A860BE |