| Tail Number / N-Number | N221SB |
| Manufacturer | SCHLEICHER |
| Model | ASK-21 |
| Year Built | 1999 |
| Manufacturer's Serial Number | 21699 |
| 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) |
| Number of Engines | 0 engines |
| Type of Registrant | Corporation |
| Owner Name | SUGARBUSH SOARING ASSOCIATION |
| Street | PO BOX 123 |
| City | WARREN |
| State | VT |
| Zip Code | 05674-0123 |
| Region | New England |
| County | Washington County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1999-09-03 |
| Certificate Issue Date | 1999-08-17 |
| Last Action Date | 2020-09-15 |
| Expiration Date | 2028-02-29 |
| Status | Valid Registration |
| Mode S Code | 50363112 |
| Mode S Code Hex | A1E64A |