| Tail Number / N-Number | N521S |
| Manufacturer | SIAI MARCHETTI |
| Model | S-211 |
| Year Built | 1985 |
| Manufacturer's Serial Number | 032/02-021 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | P&W CANADA |
| Engine Model | JT15D-4C |
| Engine Type | Turbo-fan |
| Number of Engines | 1 engine |
| Thrust | 2,500 pounds-force (11.1 kN) |
| Type of Registrant | LLC |
| Owner Name | MARCHETTI 211 LLC |
| Street | 303 N LAST CHANCE GULCH STE 403 PMB 13029 |
| City | HELENA |
| State | MT |
| Zip Code | 59601 |
| Region | Northwest Mountain |
| County | Lewis and Clark County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2015-07-13 |
| Certificate Issue Date | 2015-06-09 |
| Last Action Date | 2021-02-09 |
| Expiration Date | 2028-06-30 |
| Status | Valid Registration |
| Mode S Code | 51507065 |
| Mode S Code Hex | A68E35 |