| Tail Number / N-Number | N121 |
| Manufacturer | FOUTZ ROBERT V |
| Model | COZY MARK IV |
| Year Built | 2018 |
| Manufacturer's Serial Number | 1648 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not 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 | YIO-360 EXP |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | Individual |
| Owner Name | FOUTZ ROBERT V |
| Street | 202 BISHOP RD |
| City | BLACKSBURG |
| State | VA |
| Zip Code | 24060-1212 |
| Region | Eastern |
| County | Montgomery County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2018-10-18 |
| Certificate Issue Date | 2018-04-05 |
| Last Action Date | 2020-11-17 |
| Expiration Date | 2028-04-30 |
| Status | Valid Registration |
| Mode S Code | 50053550 |
| Mode S Code Hex | A05768 |
Deregistered Aircraft 1 of 3. This aircraft was previously assigned the N-number N121.
| Tail Number / N-Number | N121 |
| Manufacturer | LOCKHEED |
| Model | 749A-79 |
| Year Built | 1950 |
| Manufacturer's Serial Number | 2654 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 63 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Number of Engines | 4 engines |
| Average Cruising Speed | 262 miles per hour |
| Type of Registrant | Government |
| Owner Name | DEPT OF TRANSPORTATION |
| Street | FEDERAL AVIATION ADMIN 800 INDEPENDENCE AVE SW |
| City | WASHINGTON |
| State | DC |
| Zip Code | 20590 |
| Region | Eastern |
| County | Montgomery County |
| Country | US |
| Certificate Issue Date | 1968-04-01 |
| Last Status | Valid Registration |
| Cancellation Date | 1969-03-21 |
| Exported To | JAPAN |
Deregistered Aircraft 2 of 3. This aircraft was previously assigned the N-number N121.
| Tail Number / N-Number | N121 |
| Manufacturer | CURTISS AIRPLANE CO |
| Model | CANUCK |
| Manufacturer's Serial Number | 2684 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Corporation |
| Owner Name | CHICAGO FLYING CLUB |
| Street | 330 S DEARBORN ST |
| City | HARRISON |
| State | IL |
| Zip Code | 61072 |
| Region | Great Lakes |
| County | Montgomery County |
| Last Status | Valid Registration |
| Cancellation Date | 1928-11-30 |
Deregistered Aircraft 3 of 3. This aircraft was previously assigned the N-number N121.
| Tail Number / N-Number | N121 |
| Manufacturer | CARL |
| Model | BENSEN B-8M |
| Year Built | 1972 |
| Manufacturer's Serial Number | WH0C-1490 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 45 miles per hour |
| Type of Registrant | Individual |
| Owner Name | SALE REPORTED |
| Street | RT 1 |
| City | LENA |
| State | MS |
| Zip Code | 39094 |
| County | Montgomery County |
| Country | US |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1973-01-16 |
| Last Action Date | 1978-03-25 |
| Last Status | Sale Reported – Canceled |
| Cancellation Date | 2012-06-04 |