Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N90561.
| Tail Number / N-Number | N90561 |
| Manufacturer | SIKORSKY |
| Model | S-58D |
| Year Built | 1958 |
| Manufacturer's Serial Number | 58-1332 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 14 seats |
| Weight Class | CLASS 2 (12,500 - 19,999 pounds gross take off weight) |
| Engine Manufacturer | WRIGHT |
| Engine Model | R-1820 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 1,475 hp (1,100 kW) |
| Average Cruising Speed | 108 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | MIDWEST HELICOPTERS AIRWAYS INC |
| Street | MIDWEST HELIPORT |
| City | HINSDALE |
| State | IL |
| Zip Code | 60521 |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1974-07-27 |
| Certificate Issue Date | 1977-07-15 |
| Last Action Date | 1997-12-29 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2013-07-09 |
| Mode S Code | 53102403 |
| Mode S Code Hex | AC8503 |