| Tail Number / N-Number | N904WM |
| Manufacturer | MESSERSCHMITT-BOLKOW-BLOHM GMB |
| Model | BO 105M |
| Manufacturer's Serial Number | 6130 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 5 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Type of Registrant | LLC |
| Owner Name | SIERRA GOLF ROTORCRAFT LLC |
| Street | 3511 SILVERSIDE RD STE 105 |
| City | WILMINGTON |
| State | DE |
| Zip Code | 19810-4902 |
| Region | Eastern |
| County | New Castle County |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 2023-02-02 |
| Last Action Date | 2023-02-10 |
| Expiration Date | 2030-02-28 |
| Status | Valid Registration |
| Mode S Code | 53100010 |
| Mode S Code Hex | AC8008 |