Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N766U.
| Tail Number / N-Number | N766U |
| Manufacturer | BEECH |
| Model | D55 |
| Year Built | 1968 |
| Manufacturer's Serial Number | TE-636 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | IO 520 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 2 engines |
| Horsepower per Engine | 285 hp (213 kW) |
| Total Horsepower | 570 hp (425 kW) |
| Average Cruising Speed | 165 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | GORDON COOPER TECHNOLOGY CENTER |
| Street | 1 JOHN C BRUTON BLVD |
| City | SHAWNEE |
| State | OK |
| Zip Code | 74804-9102 |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1968-10-07 |
| Certificate Issue Date | 2008-07-15 |
| Last Action Date | 2008-07-15 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2017-06-07 |
| Mode S Code | 52454624 |
| Mode S Code Hex | AA5994 |