| Tail Number / N-Number | N400RK |
| Manufacturer | TEXTRON AVIATION INC |
| Model | 525B |
| Year Built | 2019 |
| Manufacturer's Serial Number | 525B0604 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 8 seats |
| Weight Class | CLASS 2 (12,500 - 19,999 pounds gross take off weight) |
| Engine Manufacturer | WILLIAMS |
| Engine Model | FJ44-3A |
| Engine Type | Turbo-fan |
| Number of Engines | 2 engines |
| Thrust per Engine | 2,820 pounds-force (12.5 kN) |
| Total Thrust | 5,640 pounds-force (25.1 kN) |
| Type of Registrant | LLC |
| Owner Name | OZARK AIR SERVICES LLC |
| Street | 13732 HIGHWAY 7 |
| City | WARSAW |
| State | MO |
| Zip Code | 65355-4703 |
| Region | Central |
| County | Benton County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2019-12-09 |
| Certificate Issue Date | 2022-07-25 |
| Last Action Date | 2022-07-25 |
| Expiration Date | 2029-07-31 |
| Status | Valid Registration |
| Mode S Code | 51127042 |
| Mode S Code Hex | A4AE22 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N400RK.
| Tail Number / N-Number | N400RK |
| Manufacturer | PIPER |
| Model | PA-22 |
| Year Built | 1952 |
| Manufacturer's Serial Number | 22-493 |
| 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 | 0-290 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 140 hp (104 kW) |
| Average Cruising Speed | 94 miles per hour |
| Type of Registrant | Individual |
| Owner Name | KNEE RICHARD M |
| Street | 506 BISHOP ST |
| City | SMITHVILLE |
| State | TX |
| Zip Code | 78957-1611 |
| County | Benton County |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1955-12-28 |
| Certificate Issue Date | 1999-12-22 |
| Last Action Date | 2008-12-16 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2014-09-10 |