| Tail Number / N-Number | N638TT |
| Manufacturer | DIAMOND AIRCRAFT INDUSTRIES |
| Model | HK 36 TTC |
| Year Built | 1998 |
| Manufacturer's Serial Number | 36.638 |
| 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 | Corporation |
| Owner Name | MIDWEST CORPORATE AIR INC |
| Street | 3100 STATE ROUTE 47 W |
| City | BELLEFONTAINE |
| State | OH |
| Zip Code | 43311-9012 |
| Region | Great Lakes |
| County | Logan County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1998-09-24 |
| Certificate Issue Date | 2021-01-25 |
| Last Action Date | 2021-01-25 |
| Expiration Date | 2028-01-31 |
| Status | Valid Registration |
| Mode S Code | 52056457 |
| Mode S Code Hex | A85D2F |