| Tail Number / N-Number | N21AF |
| Manufacturer | SCHLEICHER |
| Model | ASK-21 |
| Year Built | 1983 |
| Manufacturer's Serial Number | 21179 |
| 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 | ADRIAN SOARING CLUB |
| Street | 1066 S GROVE ST |
| City | YPSILANTI |
| State | MI |
| Zip Code | 48198-6797 |
| Region | Great Lakes |
| County | Washtenaw County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1983-12-29 |
| Certificate Issue Date | 1984-03-05 |
| Last Action Date | 2022-10-31 |
| Expiration Date | 2029-11-30 |
| Status | Valid Registration |
| Mode S Code | 50333457 |
| Mode S Code Hex | A1B72F |