| Tail Number / N-Number | N591AK |
| Type of Reservation | 2 year hold for canceled N-numbers |
| Reserving Party Name | CANCELLED/NOT ASSIGNED |
| Date Reserved | 2022-12-31 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N591AK.
| Tail Number / N-Number | N591AK |
| Manufacturer | SIKORSKY |
| Model | S-76B |
| Year Built | 1989 |
| Manufacturer's Serial Number | 760348 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 14 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | P&W CANADA |
| Engine Model | PT6B-36A |
| Engine Type | Turbo-shaft |
| Number of Engines | 2 engines |
| Horsepower per Engine | 981 hp (732 kW) |
| Total Horsepower | 1,962 hp (1,464 kW) |
| Type of Registrant | Corporation |
| Owner Name | UNICAL AVIATION INC |
| Street | 680 S LEMON AVE |
| City | WALNUT |
| State | CA |
| Zip Code | 91789-2934 |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1989-04-26 |
| Certificate Issue Date | 2019-09-18 |
| Last Action Date | 2021-03-29 |
| Last Status | Registration Expired - Pending Cancellation |
| Cancellation Date | 2022-12-31 |