| Tail Number / N-Number | N3981C |
| Manufacturer | BURKHART GROB |
| Model | G 103 TWIN II |
| Year Built | 1983 |
| Manufacturer's Serial Number | 3807 |
| 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 | NONE |
| Engine Model | NONE |
| Number of Engines | 0 engines |
| Type of Registrant | Corporation |
| Owner Name | NORTHERN CALIFORNIA SOARING ASSOCIATION |
| Street | PO BOX 26 |
| City | BYRON |
| State | CA |
| Zip Code | 94514-0026 |
| Region | Western-Pacific |
| County | Contra Costa County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1983-07-25 |
| Certificate Issue Date | 1996-06-25 |
| Last Action Date | 2020-06-24 |
| Expiration Date | 2027-09-30 |
| Status | Valid Registration |
| Mode S Code | 51121377 |
| Mode S Code Hex | A4A2FF |