| Tail Number / N-Number | N999ES |
| Manufacturer | BEECH |
| Model | C90 |
| Year Built | 1973 |
| Manufacturer's Serial Number | LJ-612 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 9 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | P&W CANADA |
| Engine Model | PT6A-135A |
| Engine Type | Turbo-prop |
| Number of Engines | 2 engines |
| Horsepower per Engine | 750 hp (560 kW) |
| Total Horsepower | 1,500 hp (1,119 kW) |
| Average Cruising Speed | 201 miles per hour |
| Type of Registrant | LLC |
| Owner Name | GATEWOOD AVIATION LLC |
| Street | 102 CHAMPION DR |
| City | LAKEWAY |
| State | TX |
| Zip Code | 78734-5166 |
| Region | Southwestern |
| County | Travis County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2007-06-13 |
| Certificate Issue Date | 2021-07-07 |
| Last Action Date | 2021-07-07 |
| Expiration Date | 2028-07-31 |
| Status | Valid Registration |
| Mode S Code | 53372207 |
| Mode S Code Hex | ADF487 |