| Tail Number / N-Number | N691K |
| Manufacturer | TRAVEL AIR |
| Model | E-4000 |
| Year Built | 1929 |
| Manufacturer's Serial Number | 1277 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 3 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | R670-SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 225 hp (168 kW) |
| Average Cruising Speed | 79 miles per hour |
| Type of Registrant | Individual |
| Owner Name | LOCK ROBERT A |
| Street | 610 GRASSLANDS VILLAGE CIR |
| City | LAKELAND |
| State | FL |
| Zip Code | 33803-5478 |
| Region | Southern |
| County | Polk County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2005-08-18 |
| Certificate Issue Date | 2011-05-20 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-05-31 |
| Status | Valid Registration |
| Mode S Code | 52227516 |
| Mode S Code Hex | A92F4E |