Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N51721.
| Tail Number / N-Number | N51721 |
| Manufacturer | ENSTROM HELICOPTER CORP |
| Model | 280C |
| Year Built | 1978 |
| Manufacturer's Serial Number | 1127 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 3 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | HI0-360 SER |
| Engine Type | Turbo-shaft |
| Number of Engines | 1 engine |
| Horsepower | 205 hp (153 kW) |
| Type of Registrant | Corporation |
| Owner Name | SPECTRUM HELICOPTERS INC |
| Street | 45 BERGEN TURNPIKE |
| City | RIDGEFIELD PARK |
| State | NJ |
| Zip Code | 07660 |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1978-03-31 |
| Certificate Issue Date | 1986-04-29 |
| Last Action Date | 1992-07-18 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2013-04-01 |
| Mode S Code | 51477050 |
| Mode S Code Hex | A67E28 |