| Tail Number / N-Number | N4174L |
| Manufacturer | ROBINSON HELICOPTER COMPANY |
| Model | R44 II |
| Year Built | 2008 |
| Manufacturer's Serial Number | 12495 |
| 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 | IO-540-AE1A5 |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 260 hp (194 kW) |
| Type of Registrant | LLC |
| Owner Name | CST & SONS LLC |
| Street | 21 OLYMPIC DR |
| City | SOUTH BARRINGTON |
| State | IL |
| Zip Code | 60010-1093 |
| Region | Great Lakes |
| County | Lake County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2021-06-14 |
| Certificate Issue Date | 2016-12-23 |
| Last Action Date | 2022-07-12 |
| Expiration Date | 2029-12-31 |
| Status | Valid Registration |
| Mode S Code | 51170420 |
| Mode S Code Hex | A4F110 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N4174L.
| Tail Number / N-Number | N4174L |
| Manufacturer | CESSNA |
| Model | 172G |
| Manufacturer's Serial Number | 17254243 |
| Aircraft Type | Fixed wing single engine |
| 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 | 105 miles per hour |
| Type of Registrant | Individual |
| Owner Name | PENWELL FRANK M |
| Street | 6669 FORREST DR |
| City | FRIDAY HARBOR |
| State | WA |
| Zip Code | 98250 |
| County | Lake County |
| Country | US |
| Certificate Issue Date | 1989-07-26 |
| Last Action Date | 1993-10-21 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1993-11-23 |