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Robinson Helicopter R44 II
N4174L is a Robinson Helicopter R44 II, a rotorcraft with a piston engine (a helicopter or multicopter), built in 2008. It has 4 seats. It is registered to Cst & Sons LLC, an LLC in South Barrington, Illinois. The registration is valid: it was issued on December 23, 2016 and expires on December 31, 2029. It holds a standard airworthiness certificate for normal, dated June 14, 2021.
Where is it now Last seen October 15 at 5:10 pm.
Last seen October 15 at 5:10 pm. Checking whether it is in the air right now…
Aircraft broadcast their own position; volunteer receivers pool what they hear. Owners who have asked the FAA not to be displayed are not shown.
Flight history: where it flew in the last seven days · follow it on the live map
Aircraft
- Maker
- Robinson Helicopter (United States)FAA spelling: ROBINSON HELICOPTER COMPANY
- Model
- R44 II · all R44 IIs and related versions
- Built of
- steel tube and aluminiumA welded steel-tube frame carries the loads, with aluminium (and some fibreglass) skins over it. A welded steel-tube frame under aluminium and fibreglass skins; metal rotor blades. This is how the Robinson R44 family is built; the FAA does not record construction for each aircraft, and the type certificate data sheet is the authority for this one.
- Serial number
- 12495
- Type
- RotorcraftFAA type of aircraft code 6 (the FAA's broad category for the airframe). Every aircraft with this code · All codes
- Power
- Piston (reciprocating)FAA type of engine code 1 (what powers it, as the FAA classes engines). Every aircraft with this code · All codes, 1 motor · Lycoming IO-540-AE1A5 · 260 hp
- Fuel
- 100LL avgas
- Seats
- 4
- Year built
- 2008
- Transponder code
- A4F110 (octal 51170420)
Registration
- Status
- Valid registrationFAA registration status code V (whether the registration certificate is in force). Every aircraft with this code · All codes
- Certificate issued
- December 23, 2016
- Expires
- December 31, 2029
- Last FAA action
- September 22, 2023
- Airworthiness
- StandardFAA airworthiness class code 1 (the kind of airworthiness certificate it flies under and what it is approved for). Every aircraft with this code · All codes · NormalFAA certificate purpose code N (the kind of airworthiness certificate it flies under and what it is approved for). All codes · June 14, 2021
- FAA region
- Great LakesFAA region code C (the FAA regional office that handles the record). All codes
- FAA record id
- 01015973
Owner as the FAA publishes it
- Name
- Cst & Sons LLC
- Type
- LLCFAA type of owner code 7 (who holds the registration: a person, a company, a trust or a government body). Every aircraft with this code · All codes
- Address
- 21 Olympic Dr
South Barrington, IL 60010-1093
Owners can ask the FAA to withhold their name and address from public files. When they do, those fields are blank here as well. How that works.
Documents on file 0
No bills of sale, loans or other documents are indexed against this tail number.
Earlier use of this number 1
Connections how N4174L links to the rest of the register
- Robinson R44 1,944 registered
- Robinson Helicopter 3,183 aircraft on the register
- Built of steel tube and aluminium · as the model family is built; the register does not record it per aircraft
- Lycoming IO-540-AE1A5 1,044 aircraft with this engine series · 260 hp
- Type certificate H11NM · held by Robinson Helicopter CO
- Cst & Sons LLC 5 aircraft in the fleet
- South Barrington, IL 13 aircraft registered in this town
- Illinois 8,061 aircraft registered
- FAA orders naming the Robinson R44 42 airworthiness directives
- Failure reports filed on the Robinson R44 1,407 reports since 1995
- Approved modifications for the Robinson R44 110 supplemental type certificates
- FAA orders naming the Lycoming IO-540-AE1A5 21 airworthiness directives
- Failure reports on the Lycoming IO-540-AE1A5 924 reports since 1995
- Where N4174L is now · Last seen October 15 at 5:10 pm.
The whole map of how records connect · these connections as data: /graph/aircraft/N4174L.json.
Records check free · 3 to understand · 2 clear
The public federal record on N4174L, read the way a buyer, lender or insurer reads it: FAA registration, prior tail numbers keyed on the serial number, reuse of the tail number, recent registry filings, and the NTSB accident record under this and every earlier registration.
Valid registration to Cst & Sons LLC, an LLC, certificate issued December 23, 2016, expires December 31, 2029. No fractional interest recorded. [1]
The airworthiness certificate on file is dated June 14, 2021, 13 years after the 2008 manufacture year. A re-issued certificate commonly follows export and re-import, a rebuild, or a return to the register after cancellation. The cause is documented in the FAA aircraft records file, which the full report obtains. [1]
No earlier tail number is recorded against serial 12495 for this model in the deregistered file. [2]
N4174L was previously assigned to 1 other aircraft: Cessna 172G (serial 17254243, cancelled November 23, 1993). Histories keyed to the tail number alone can mix aircraft up; this check keys on the serial number. [2]
No bills of sale, loans or releases have reached the registry in recent weeks. The index covers only recent filings; older liens are in the records file. [3]
2 NTSB records under N4174L: Accident on July 26, 2023 at Charles City, IA: no injuries, substantial damage. Accident on October 27, 1990 at Anacortes, WA: no injuries, substantial damage. Details below. [4]
These live in the FAA aircraft records file (every document ever filed against the aircraft) and, for larger aircraft, the International Registry. Part of the full report.
AD compliance against the logbooks and flight-activity reconciliation are researched layers of the full report.
NTSB records 2
Aircraft on the NTSB record: Robinson Helicopter Company R44 II · operated under 091
The pilot’s improper preflight of the helicopter to ensure that it was within the loading and performance limitations that resulted in settling and impact with terrain during initial climb.
Full record in plain English · Docket and reports at the NTSB
Aircraft on the NTSB record: Cessna 172G · operated under 091
THE PILOT POORLY COMPENSATED FOR THE WIND CONDITION.
Full record in plain English · Docket and reports at the NTSB
- FAA Releasable Aircraft Database, master file, file of November 3, 2026. registry.faa.gov/
- FAA deregistered aircraft file (part of the same download), file of November 3, 2026. registry.faa.gov/
- FAA document index: registry documents received in recent weeks, file of November 3, 2026. registry.faa.gov/
- NTSB aviation accident database (CAROL), records through October 28, 2026. data.ntsb.gov/carol-main-public/basic-search
This automated check reads the public federal record. Nothing here is a legal opinion, an appraisal or a statement about the aircraft's condition; a CLEAR line is a statement about the searched record, not the aircraft.
Source: FAA Civil Aviation Registry, Releasable Aircraft Database, November 3, 2026. See this record on the FAA site · This record as data