| Tail Number / N-Number | N252MD |
| Manufacturer | FREDERICK MARK L |
| Model | FREDERICK RV-4 |
| Year Built | 1993 |
| Manufacturer's Serial Number | 4001 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | 0-320 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | Individual |
| Owner Name | FREEMAN EDWARD B |
| Street | 509 HI RIDGE DR |
| City | KILLEEN |
| State | TX |
| Zip Code | 76549-3381 |
| Region | Southwestern |
| County | Fisher County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1993-05-22 |
| Certificate Issue Date | 2017-08-02 |
| Last Action Date | 2020-05-09 |
| Expiration Date | 2027-08-31 |
| Status | Valid Registration |
| Mode S Code | 50460003 |
| Mode S Code Hex | A26003 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N252MD.
| Tail Number / N-Number | N252MD |
| Manufacturer | CESSNA |
| Model | 336 |
| Manufacturer's Serial Number | 336-0061 |
| Aircraft Type | Fixed wing multi 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) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 135 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | AIR EXCHANGE |
| Street | 1098 S MILWAUKEE AVE |
| City | WHEELING |
| State | IL |
| Zip Code | 60090 |
| Region | Great Lakes |
| County | Fisher County |
| Certificate Issue Date | 1973-04-03 |
| Last Status | Valid Registration |
| Cancellation Date | 1973-04-12 |
| Exported To | CANADA |