Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N4388S.
| Tail Number / N-Number | N4388S |
| Manufacturer | SIKORSKY |
| Model | S-58JT |
| Year Built | 1962 |
| Manufacturer's Serial Number | 581551 |
| 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-1820-66 |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 1,350 hp (1,007 kW) |
| Type of Registrant | Corporation |
| Owner Name | MIDWEST HELICOPTER AIRWAYS INC |
| Street | RT 66 & FRONTAGE ROAD |
| City | HINSDALE |
| State | IL |
| Zip Code | 60521 |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1972-08-04 |
| Certificate Issue Date | 1974-01-09 |
| Last Action Date | 2007-06-19 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 2007-07-30 |
| Mode S Code | 51242127 |
| Mode S Code Hex | A54457 |