| Tail Number / N-Number | N558NU |
| Manufacturer | FREEFLY SYSTEMS |
| Model | ALTA X |
| Manufacturer's Serial Number | ECN2688781 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 0 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 4 engines |
| Type of Registrant | Government |
| Owner Name | NASA LANGLEY RESEARCH CENTER |
| Street | 6 E TAYLOR ST |
| City | HAMPTON |
| State | VA |
| Zip Code | 23681-2130 |
| Region | Eastern |
| County | Hampton city |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 2021-06-05 |
| Last Action Date | 2021-06-05 |
| Expiration Date | 2028-06-30 |
| Status | Valid Registration |
| Mode S Code | 51617142 |
| Mode S Code Hex | A71E62 |