Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N51684.
| Tail Number / N-Number | N51684 |
| Manufacturer | ENSTROM |
| Model | F-28C |
| Year Built | 1977 |
| Manufacturer's Serial Number | 409 |
| 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 | HIO-360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 205 hp (153 kW) |
| Average Cruising Speed | 75 miles per hour |
| Type of Registrant | Individual |
| Owner Name | HILEMAN RANDALL L |
| Street | THREE ARROWS RANCH RT 2 |
| City | MCDONALD |
| State | KS |
| Zip Code | 67745 |
| Country | US |
| Airworthiness Classification | Multiple |
| Airworthiness Date | 1982-08-09 |
| Certificate Issue Date | 1982-04-13 |
| Last Action Date | 1991-03-23 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2013-04-01 |
| Mode S Code | 51475506 |
| Mode S Code Hex | A67B46 |