| Tail Number / N-Number | N977TS |
| Manufacturer | ALEXANDER SCHLEICHER GMBH & CO |
| Model | ASK 21 |
| Manufacturer's Serial Number | 21821 |
| Aircraft Type | Glider |
| 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) |
| Number of Engines | 0 engines |
| Type of Registrant | Corporation |
| Owner Name | TEXAS SOARING ASSOCIATION INC |
| Street | PO BOX 1069 |
| City | MIDLOTHIAN |
| State | TX |
| Zip Code | 76065-1069 |
| Region | Southwestern |
| County | Ellis County |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 2007-05-02 |
| Last Action Date | 2022-11-15 |
| Expiration Date | 2030-04-30 |
| Status | Valid Registration |
| Mode S Code | 53317540 |
| Mode S Code Hex | AD9F60 |