Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N4581E.
| Tail Number / N-Number | N4581E |
| Manufacturer | AERO COMMANDER |
| Model | 680FL |
| Year Built | 1967 |
| Manufacturer's Serial Number | 1672-134 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 11 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | IGSO-540-B1A |
| Engine Type | Reciprocating |
| Number of Engines | 2 engines |
| Horsepower per Engine | 380 hp (283 kW) |
| Total Horsepower | 760 hp (567 kW) |
| Average Cruising Speed | 188 miles per hour |
| Type of Registrant | Individual |
| Owner Name | COMBS HARRY B JR |
| Street | LOGAN FIELD AIRPORT |
| City | BILLINGS |
| State | MT |
| Zip Code | 59101 |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1967-06-05 |
| Certificate Issue Date | 1986-06-23 |
| Last Action Date | 1998-04-24 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2012-12-07 |
| Mode S Code | 51311124 |
| Mode S Code Hex | A59254 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N4581E.
| Tail Number / N-Number | N4581E |
| Manufacturer | AERONCA |
| Model | 7CCM |
| Manufacturer's Serial Number | 7CCM153 |
| 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 |
| Average Cruising Speed | 90 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | SEVDY SORENSEN AVIATION INC |
| Certificate Issue Date | 1953-03-19 |
| Last Status | Valid Registration |
| Cancellation Date | 1953-07-03 |
| Exported To | CANADA |
| Mode S Code | 51311124 |
| Mode S Code Hex | A59254 |