| Tail Number / N-Number | N3173U |
| Manufacturer | CARSON HELICOPTERS / SIKORSKY |
| Model | S61A |
| Year Built | 1963 |
| Manufacturer's Serial Number | 61186 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 18 seats |
| Weight Class | CLASS 2 (12,500 - 19,999 pounds gross take off weight) |
| Engine Manufacturer | GE |
| Engine Model | CT58-140-1 |
| Engine Type | Turbo-shaft |
| Number of Engines | 2 engines |
| Horsepower per Engine | 1,400 hp (1,044 kW) |
| Total Horsepower | 2,800 hp (2,089 kW) |
| Type of Registrant | Corporation |
| Owner Name | SILLER HELICOPTERS INC |
| Street | 1250 SMITH RD |
| City | YUBA CITY |
| State | CA |
| Zip Code | 95991-6948 |
| Region | Western-Pacific |
| County | Sutter County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Restricted |
| Airworthiness Date | 2014-03-03 |
| Certificate Issue Date | 2011-05-24 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-05-31 |
| Status | Valid Registration |
| Mode S Code | 50661646 |
| Mode S Code Hex | A363A6 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N3173U.
| Tail Number / N-Number | N3173U |
| Manufacturer | BELL HELICOPTER TEXTRON |
| Model | 206L-1 |
| Year Built | 1982 |
| Manufacturer's Serial Number | 45746 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 7 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Corporation |
| Owner Name | PROFESSIONAL AVIATION CORP |
| Street | 5417 NW 36TH ST |
| City | MIAMI SPRINGS |
| State | FL |
| Zip Code | 33166 |
| Region | Southern |
| County | Sutter County |
| Last Status | Valid Registration |
| Cancellation Date | 1982-11-12 |
| Exported To | NIGERIA |