N4174L is a 2008 Robinson Helicopter Company R44 II (rotorcraft) with serial number 12495, registered in South Barrington, IL. Its FAA registration is valid and runs until Dec 31, 2029; the renewal window opens on Jun 30, 2029. It is powered by a Lycoming IO-540-AE1A5 rated at 260 hp. Its airworthiness certificate is in the standard class (normal), issued Jun 14, 2021. It is one of 1,326 R44 II aircraft in the FAA registry, 32 of them registered in Illinois. About 49% of them were built after it. The NTSB accident database lists one record for this airframe since 2008, the latest on Jul 26, 2023.
Registration
- FAA status
- Valid registration
- Expires
- Dec 31, 2029
- Registrant type
- LLC
- Registered owner
- CST & SONS LLC
- Location
- South Barrington, IL
- Local FAA office (FSDO)
- Greater Chicago FSDO (CHI FSDO) · (847) 294-8700
- Certificate issued
- Dec 23, 2016
- Last FAA action
- Sep 22, 2023
- Mode S code (hex)
- A4F110
- Mode S code (octal)
- 51170420
- Official record
- registry.faa.gov
Aircraft
- Manufacturer
- ROBINSON HELICOPTER COMPANY
- Model
- R44 II
- Type certificate (TCDS)
- H11NM (Robinson Helicopter Company)
- Year manufactured
- 2008
- Serial number
- 12495
- Aircraft type
- Rotorcraft
- Engine type
- Reciprocating
- Engine
- LYCOMING IO-540-AE1A5 (260 hp)
- Engines / seats
- 1 / 4
- Weight class
- Up to 12,499 lb
- Airworthiness
- Standard since Jun 14, 2021
- Approved operations
- Normal
Public airports near South Barrington
| Airport | ID | Distance | Tower | Fuel |
|---|---|---|---|---|
| Schaumburg Regional Chicago/Schaumburg, IL | 06C | 8 mi | Non-towered | 100LL, A |
| Lake In The Hills Chicago/Lake In The Hills, IL | 3CK | 12 mi | Non-towered | 100LL, A |
| Chicago Executive Chicago/Prospect Heights/Wheeling, IL | KPWK | 13 mi | Towered | 100LL, A1+ |
Straight-line distance from the registration city, from the FAA airport directory (NASR). The registry does not say where an aircraft is based.
Earlier registrations of this number
| Canceled | Aircraft | Serial | Year | Exported to | Same airframe today |
|---|---|---|---|---|---|
| Nov 23, 1993 | CESSNA 172G | 17254243 |
NTSB accident and incident records
| Date | Place | Aircraft (as NTSB recorded it) | Damage | Highest injury | NTSB no. |
|---|---|---|---|---|---|
| Jul 26, 2023 | Charles City, IA | Robinson Helicopter Company R44 II this airframe | Substantial | None | CEN23LA326 |
From the NTSB aviation accident database (events since 2008, data through Oct 28, 2026), matched by N-number. An N-number can move between aircraft, so each row is checked against the serial number on the current registration.