Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N4254X.
| Tail Number / N-Number | N4254X |
| Manufacturer | HILLER |
| Model | UH-12D |
| Year Built | 1962 |
| Manufacturer's Serial Number | 1378 |
| 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) |
| Engine Manufacturer | LYCOMING |
| Engine Model | VO-540 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 310 hp (231 kW) |
| Average Cruising Speed | 75 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | MAIN STREET AVIATION INC |
| Street | 2004 S HWY 76 |
| City | NEWCASTLE |
| State | OK |
| Zip Code | 73065 |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1982-03-18 |
| Certificate Issue Date | 1993-08-31 |
| Last Action Date | 1997-05-29 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2015-05-15 |
| Mode S Code | 51210454 |
| Mode S Code Hex | A5112C |