| Tail Number / N-Number | N91556 |
| Manufacturer | HILLER |
| Model | UH-12B |
| Year Built | 1952 |
| Manufacturer's Serial Number | 300 |
| 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 | FRANKLIN |
| Engine Model | 6A&6V335 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 210 hp (157 kW) |
| Average Cruising Speed | 63 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | PARKS LEASING INC |
| Street | 2485 N STATE ST # 2 |
| City | UKIAH |
| State | CA |
| Zip Code | 95482-3020 |
| Region | Western-Pacific |
| County | Mendocino County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1977-06-28 |
| Certificate Issue Date | 2015-02-12 |
| Last Action Date | 2020-09-09 |
| Expiration Date | 2028-02-29 |
| Status | Valid Registration |
| Mode S Code | 53126144 |
| Mode S Code Hex | ACAC64 |