Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N4243X.
| Tail Number / N-Number | N4243X |
| Manufacturer | ROCKWELL INTERNATIONAL |
| Model | S-2R |
| Year Built | 1974 |
| Manufacturer's Serial Number | 2019R |
| 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) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 82 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | PROGRESO AVIATION INC |
| Street | PO BOX 615 |
| City | PROGRESO |
| State | TX |
| Zip Code | 78579 |
| Region | Southwestern |
| Last Status | Valid Registration |
| Cancellation Date | 1974-08-19 |
| Exported To | MEXICO |
| Mode S Code | 51206522 |
| Mode S Code Hex | A50D52 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N4243X.
| Tail Number / N-Number | N4243X |
| Manufacturer | CARLSON WILLIAM D |
| Model | QUICKIE |
| Year Built | 1981 |
| Manufacturer's Serial Number | 472 |
| Aircraft Type | Fixed wing single engine |
| 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) |
| Engine Manufacturer | ONAN |
| Engine Model | ALL MDLS A/B |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1981-06-30 |
| Last Action Date | 1981-05-16 |
| Last Status | N-Number assigned, has not been registered and is pending cancellation |
| Cancellation Date | 2011-04-08 |
| Mode S Code | 51206522 |
| Mode S Code Hex | A50D52 |