| Tail Number / N-Number | N4121 |
| Manufacturer | MOONEY |
| Model | M-18C |
| Year Built | 1953 |
| Manufacturer's Serial Number | 288 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | A&C65 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 65 hp (48 kW) |
| Average Cruising Speed | 103 miles per hour |
| Type of Registrant | Individual |
| Owner Name | LEE JONATHAN CE |
| Street | 650 ALDER LN |
| City | BOSSIER CITY |
| State | LA |
| Zip Code | 71111-5178 |
| Region | Southwestern |
| County | Bossier Parish |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1955-09-23 |
| Certificate Issue Date | 2015-03-12 |
| Last Action Date | 2022-02-24 |
| Expiration Date | 2028-03-31 |
| Status | Valid Registration |
| Mode S Code | 51157011 |
| Mode S Code Hex | A4DE09 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N4121.
| Tail Number / N-Number | N4121 |
| Manufacturer | FAIRCHILD |
| Model | 24W-9 |
| Manufacturer's Serial Number | 208 |
| 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) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 102 miles per hour |
| Type of Registrant | Individual |
| Owner Name | DU PONT A FELIX |
| Street | 56 OAK AVE |
| City | REHOBOTH |
| State | DE |
| Zip Code | 19801 |
| Region | Eastern |
| County | Bossier Parish |
| Certificate Issue Date | 1942-11-20 |
| Last Status | Valid Registration |
| Cancellation Date | 1943-05-15 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N4121.
| Tail Number / N-Number | N4121 |
| Manufacturer | LINCOLN AIRCRAFT CO |
| Model | LINCOLN PAGE 3 |
| Manufacturer's Serial Number | 169 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 3 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | SURDAM RAYMOND V |
| Street | 100 EAST GENESEE ST |
| City | SKANEATELES |
| State | NY |
| Zip Code | 10001 |
| Region | Eastern |
| County | Bossier Parish |
| Last Status | Valid Registration |
| Cancellation Date | 1929-03-20 |