| Tail Number / N-Number | N121SP |
| Manufacturer | AERO COMMANDER |
| Model | 500-B |
| Year Built | 1960 |
| Manufacturer's Serial Number | 500B-984-25 |
| 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 | LYCOMING |
| Engine Model | TI0-540 SER |
| Engine Type | Turbo-prop |
| Number of Engines | 2 engines |
| Horsepower per Engine | 310 hp (231 kW) |
| Total Horsepower | 620 hp (463 kW) |
| Average Cruising Speed | 172 miles per hour |
| Type of Registrant | LLC |
| Owner Name | FL280 LLC |
| Street | 400 NUT TREE DR |
| City | DELAND |
| State | FL |
| Zip Code | 32724-6250 |
| Region | Southern |
| County | Lake County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1960-11-04 |
| Certificate Issue Date | 2023-02-04 |
| Last Action Date | 2023-02-10 |
| Expiration Date | 2030-02-28 |
| Status | Valid Registration |
| Mode S Code | 50054407 |
| Mode S Code Hex | A05907 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N121SP.
| Tail Number / N-Number | N121SP |
| Manufacturer | AERO COMMANDER |
| Model | 681 |
| Manufacturer's Serial Number | 6047 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 11 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 188 miles per hour |
| County | Lake County |
| Last Status | N-Number Assigned – but has not yet been registered |