| Tail Number / N-Number | N400ME |
| Manufacturer | MOONEY AIRCRAFT CORP. |
| Model | M20S |
| Year Built | 1999 |
| Manufacturer's Serial Number | 30-0040 |
| 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 | CONT MOTOR |
| Engine Model | IO-550 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 300 hp (224 kW) |
| Type of Registrant | Individual |
| Owner Name | KRAJ KRZYSZTOF |
| Street | 3136 HEMLOCK LN |
| City | NORTHBROOK |
| State | IL |
| Zip Code | 60062-5834 |
| Region | Great Lakes |
| County | Cook County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1999-11-04 |
| Certificate Issue Date | 2018-08-21 |
| Last Action Date | 2021-03-18 |
| Expiration Date | 2028-08-31 |
| Status | Valid Registration |
| Mode S Code | 51126671 |
| Mode S Code Hex | A4ADB9 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N400ME.
| Tail Number / N-Number | N400ME |
| Manufacturer | DOUGLAS |
| Model | DC-9-14 |
| Year Built | 1966 |
| Manufacturer's Serial Number | 45727 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 85 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Engine Manufacturer | P & W |
| Engine Model | JT8D SERIES |
| Engine Type | Turbo-jet |
| Number of Engines | 2 engines |
| Thrust per Engine | 7,700 pounds-force (34.3 kN) |
| Total Thrust | 15,400 pounds-force (68.5 kN) |
| Average Cruising Speed | 315 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | MIDWEST EXPRESS AIRLINES INC |
| Street | 555 AIR CARGO WAY |
| City | MILWAUKEE |
| State | WI |
| Zip Code | 53207 |
| County | Cook County |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1982-09-16 |
| Certificate Issue Date | 1984-07-30 |
| Last Action Date | 2001-02-20 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 2002-04-29 |