| Tail Number / N-Number | N589ST |
| Manufacturer | CESSNA |
| Model | 421C |
| Manufacturer's Serial Number | 421C0644 |
| 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) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 90 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | CURTIS & SON VACUUM SERVICE INC |
| Street | PO BOX 767 |
| City | LIBERTY |
| State | TX |
| Zip Code | 77575-0767 |
| Region | Southwestern |
| County | Liberty County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1979-03-16 |
| Certificate Issue Date | 2019-07-10 |
| Last Action Date | 2022-05-24 |
| Expiration Date | 2029-07-31 |
| Status | Valid Registration |
| Mode S Code | 51714371 |
| Mode S Code Hex | A798F9 |