| Tail Number / N-Number | N421SS |
| Manufacturer | CESSNA |
| Model | 421C |
| Manufacturer's Serial Number | 421C1066 |
| 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 | RIDGEAIRE INC |
| Street | PO BOX 361 |
| City | JACKSONVILLE |
| State | TX |
| Zip Code | 75766-0361 |
| Region | Southwestern |
| County | Cherokee County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1981-05-14 |
| Certificate Issue Date | 2022-04-22 |
| Last Action Date | 2022-04-22 |
| Expiration Date | 2029-04-30 |
| Status | Valid Registration |
| Mode S Code | 51200367 |
| Mode S Code Hex | A500F7 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N421SS.
| Tail Number / N-Number | N421SS |
| Manufacturer | CESSNA |
| Model | 421B |
| Manufacturer's Serial Number | 421B0314 |
| 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 | 172 miles per hour |
| Type of Registrant | Individual |
| Owner Name | WARE BILLY J |
| Street | PO BOX 4396 |
| City | ALBUQUERQUE |
| State | NM |
| Zip Code | 87196 |
| County | Cherokee County |
| Country | US |
| Certificate Issue Date | 1990-02-20 |
| Last Action Date | 1990-02-21 |
| Last Status | Valid Registration |
| Cancellation Date | 1992-05-28 |
| Exported To | MEXICO |