| Tail Number / N-Number | N4557N |
| Manufacturer | CESSNA |
| Model | 340A |
| Year Built | 1978 |
| Manufacturer's Serial Number | 340A0547 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | TSIO-520 SER |
| Engine Type | Reciprocating |
| Number of Engines | 2 engines |
| Horsepower per Engine | 300 hp (224 kW) |
| Total Horsepower | 600 hp (448 kW) |
| Average Cruising Speed | 90 miles per hour |
| Type of Registrant | LLC |
| Owner Name | WESTRA AVIATION LLC |
| Street | 100 TOWER DR |
| City | BEAVER DAM |
| State | WI |
| Zip Code | 53916-9178 |
| Region | Great Lakes |
| County | Dodge County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Certificate Issue Date | 2015-03-06 |
| Last Action Date | 2020-10-14 |
| Expiration Date | 2028-03-31 |
| Status | Valid Registration |
| Mode S Code | 51304011 |
| Mode S Code Hex | A58809 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N4557N.
| Tail Number / N-Number | N4557N |
| Manufacturer | BOEING |
| Model | N2S-5 |
| Manufacturer's Serial Number | 75-8600 |
| 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 | 93 miles per hour |
| Type of Registrant | Individual |
| Owner Name | CHASE NORMAN L JR |
| Street | RT 5 BOX 193 |
| City | BEAUMONT |
| State | TX |
| Zip Code | 77701 |
| Region | Southwestern |
| County | Dodge County |
| Certificate Issue Date | 1948-04-09 |
| Last Status | Valid Registration |
| Cancellation Date | 1951-10-02 |