Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N57987.
| Tail Number / N-Number | N57987 |
| Manufacturer | HILLER |
| Model | OH-23D |
| Manufacturer's Serial Number | 62-3780 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 75 miles per hour |
| Type of Registrant | Government |
| Owner Name | TRAILL COUNTY CIVIL DEFENSE |
| Street | XXXXXXXXXX |
| City | HILLSBORO |
| State | ND |
| Zip Code | 58045 |
| Region | Great Lakes |
| Certificate Issue Date | 1972-10-17 |
| Last Status | Valid Registration |
| Cancellation Date | 1980-11-18 |
| Mode S Code | 51671550 |
| Mode S Code Hex | A77368 |