N-Number: N4174L
Information Updated 01/06/2026
Aircraft Description
| N-Number | N4174L | ||
| Serial Number | 12495 | Status | Valid |
| Manufacturer Name | ROBINSON HELICOPTER COMPANY | Certificate Issue Date | 12/23/2016 |
| Model | R44 II | Expiration Date | 12/31/2022 |
| Type Aircraft | Rotorcraft | Type Engine | Reciprocating |
| Pending Number Change | Dealer | ||
| Date Change Authorized | Mode S Code (base 8 / octal) | 51170420 | |
| MFR Year | 2008 | Mode S Code (base 16 / hex) | A4F110 |
| Type Registration | Unknown | Fractional Owner | No |
Registered Owner
| Name | CST & SONS LLC | ||
| Street | 21 OLYMPIC DR | ||
| City | SOUTH BARRINGTON | State | IL |
| County | COOK COUNTY | Zip Code | 60010-1093 |
| Country | US | ||
Airworthiness
| Engine Manufacturer | LYCOMING | A/W Date | 09/18/2008 |
| Engine Model | IO-540-AE1A5 | Classification | Standard |
| Category | Normal | ||
Other Owner Names
| None |
NTSB Records
| Date | Purpose | Phase | Severity | Fatal/Serious/Minor | Aircraft Damage | Location |
| 10/27/1990 | PERSONAL | TAXI | NON-FATAL | 0/0/0 out of 1 | SUBSTANTIAL | ANACORTES, WA |
Deregistered Aircraft
| Deregistered Aircraft 1 of 1 | |||
| Aircraft Description | |||
| Serial Number | 17254243 | Certificate Issue Date | 07/26/1989 |
| Manufacturer Name | CESSNA | Mode S Code (base 8 / oct) | 51170420 |
| Model | 172G | Mode S Code (base 16 / hex) | A4F110 |
| Year Manufacturer | Cancel Date | 11/23/1993 | |
| Reason for Cancellation | Export To | ||
| Type Registration | Individual | ||
| Aircraft Registration prior to Deregistration | |||
| Name | PENWELL FRANK M | ||
| Street | 6669 FORREST DR | ||
| City | FRIDAY HARBOR | ||
| State | WA | Zip Code | 98250 |
| County | San Juan County | ||
| Country | |||
| Deregistered Airworthiness | |||
| Engine Manufacturer | Classification | Unknown | |
| Engine Model | Category | ||
| A/W Date | |||
| Deregistered Other Owner Names | |||
| None | |||