| Tail Number / N-Number | N4121U |
| Manufacturer | CESSNA |
| Model | 150D |
| Manufacturer's Serial Number | 15060121 |
| 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) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | 0-200 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 100 hp (75 kW) |
| Average Cruising Speed | 90 miles per hour |
| Type of Registrant | LLC |
| Owner Name | 150D LLC |
| Street | 1277 COTTON HILL RD |
| City | ATTICA |
| State | NY |
| Zip Code | 14011-9540 |
| Region | Eastern |
| County | Wyoming County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1963-10-03 |
| Certificate Issue Date | 2023-02-01 |
| Last Action Date | 2023-02-01 |
| Expiration Date | 2030-02-28 |
| Status | Valid Registration |
| Mode S Code | 51157034 |
| Mode S Code Hex | A4DE1C |