| Tail Number / N-Number | N390TF |
| Manufacturer | N390TF LLC |
| Model | RANS S-21 |
| Year Built | 2020 |
| Manufacturer's Serial Number | 07190055 |
| 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 | CONT MOTOR |
| Engine Model | IOX340 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Kit Manufacturer | RANS DESIGNS INC |
| Kit Model | S-21 OUTBOUND |
| Type of Registrant | LLC |
| Owner Name | BACK COUNTRY INVESTMENTS LLC |
| Street | PO BOX 7967 |
| City | MISSOULA |
| State | MT |
| Zip Code | 59807-7967 |
| Region | Northwest Mountain |
| County | Missoula County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2020-07-21 |
| Certificate Issue Date | 2021-07-29 |
| Last Action Date | 2021-07-29 |
| Expiration Date | 2028-07-31 |
| Status | Valid Registration |
| Mode S Code | 51102170 |
| Mode S Code Hex | A48478 |