| Tail Number / N-Number | N6691U |
| Manufacturer | MOONEY |
| Model | M20C |
| Year Built | 1963 |
| Manufacturer's Serial Number | 2418 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | O&VO-360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Average Cruising Speed | 127 miles per hour |
| Type of Registrant | Individual |
| Owner Name | SCHLEIS RALPH F |
| Street | 6416 FETZER RD |
| City | MANITOWOC |
| State | WI |
| Zip Code | 54220-9650 |
| Region | Great Lakes |
| County | Manitowoc County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1963-03-19 |
| Certificate Issue Date | 2008-02-09 |
| Last Action Date | 2022-05-27 |
| Expiration Date | 2029-10-31 |
| Status | Valid Registration |
| Mode S Code | 52154066 |
| Mode S Code Hex | A8D836 |