| Tail Number / N-Number | N904BG |
| Manufacturer | BURKHART GROB FLUGZEUGBAU |
| Model | G109 |
| Year Built | 1982 |
| Manufacturer's Serial Number | 6104 |
| Aircraft Type | Glider |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | AMA/EXPR |
| Engine Model | UNKNOWN ENG |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | OMPHROY CARLOS A |
| Street | 68-222 OLOHIO ST |
| City | WAIALUA |
| State | HI |
| Zip Code | 96791-9358 |
| Region | Western-Pacific |
| County | Honolulu County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1983-08-11 |
| Certificate Issue Date | 2021-06-14 |
| Last Action Date | 2021-06-14 |
| Expiration Date | 2028-06-30 |
| Status | Valid Registration |
| Mode S Code | 53077050 |
| Mode S Code Hex | AC7E28 |