SR04465NYOther aircraft modifications
Installation of the iPad Mount.
FAA holder: Avio Design Group Inc
Aircraft STC directory
Sikorsky Aircraft S-61N STCs
The Jun 30, 2026 FAA DRS snapshot contains 89 selected supplemental type certificates with status Current whose public applicability data names the Sikorsky Aircraft S-61N. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
89
listed Current at snapshot
23
holder directories
13
modification categories
Sep 30, 2025
latest recorded revision
Modification demand surface
Other aircraft modifications33
Avionics10
Cabin and interiors10
Cargo and special mission8
Fuel systems6
Electrical systems6
Aircraft performance4
Aircraft structures3
Propellers3
Engine and powerplant3
Safety and emergency equipment1
Rotorcraft modifications1
Aircraft connectivity1
Recorded holders
Carson Helicopters, Inc19Croman Corporation17VIH Aerospace Inc10Cougar Helicopters Inc.6Acrohelipro Global Services Inc5Coulson Aircrane Ltd.4Maxcraft Avionics Ltd.3Mechanical Specialties Inc2Vector Aerospace Helicopter Services USA Inc.2Avio Design Group Inc1Isolair Inc.1Onboard Systems International1Peregrine1OLYMPIC AERO SERVICES INC.1National Aircraft Service Inc1Aviation Specialties Unlimited Inc.1SkyTrac Systems Ltd.1Keystone Helicopter Corp.1Kawak Aviation Technologies Inc1Acrohelipro Global Services USA Inc1
Recently revised S-61N STCs
Showing the 89 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
SR01858SEOther aircraft modifications
Manufacture of the Isolair, Inc., Eliminator II Model 4600-S61 Fire Fighting System.
FAA holder: Isolair Inc.
SR00283SECabin and interiors
Removal of a 50 inch section from the forward fuselage between stations 110 and 160 and reinstallation of forward cabin with associated fabricated parts.
FAA holder: Croman Corporation
SR00427SEOther aircraft modifications
Fabrication and installation of a Helipro Model H9661N01-01, -03, -05, -07, -51, -53, -55, -57, -59 or -61 logging utility system.
FAA holder: Croman Corporation
SR00814SEAircraft structures
Fabrication of reinforcement kit - aft fuselage station 493. For model S61A, applies to S/N 61094. For model S61NM, applies to S/N 66454.
FAA holder: Croman Corporation
SR01264SEOther aircraft modifications
Fabrication of Helipro replacement windshields.
FAA holder: Croman Corporation
SR09236RCOther aircraft modifications
Installation of a Modular Harness.
FAA holder: Croman Corporation
SR04501CHOther aircraft modifications
The certification of various configurations of cockpit side windows.
FAA holder: CHI Aviation
SR01127SEPropellers
Modification of main rotor blade part number 61170-20201 in accordance with Master Drawing List RR 9633-08, Revision A, dated September 17, 2002, or later FAA approved revision. Retirement life for the modified main rotor blade, part number RR-61170-20201 is 21,200 total time in service.
FAA holder: Park Technologies, LLC
SR00039IBOther aircraft modifications
Installation of Coulson Aircrane Limited (CAL) Hoist Replacement Parts.
FAA holder: Coulson Aircrane Ltd.
SR09490RCCabin and interiors
Installation of nine passenger seat configuration.
FAA holder: McHenry Priestley Aviation LLC
SR00681SECargo and special mission
Fabrication of Onboard Systems Model 200-243-00 or 200-243-01 Cargo Hook Load Weigh System.
FAA holder: Onboard Systems International
SR01552SEFuel systems
Fabrication and installation of an external aerial liquid dispensing tank.
FAA holder: Carson Helicopters Inc
SR04609NYSafety and emergency equipment
Installation of Garmin HTAWS (Helicopter Terrain Awareness Warning System).
FAA holder: Maxcraft Avionics Ltd.
SR04483CHOther aircraft modifications
Installation of NASI NREM18M Air Conditioning Module.
FAA holder: National Aircraft Service Inc. (NASI)
SR00925DEAvionics
Installation of Garmin GTX 335/335R and GTX345/345R transponders to provide ADS-B Out and In functionality.
FAA holder: Peregrine
SR04401NYAircraft performance
Increase of Out of Ground Effect (OGE) Hover Performance.
FAA holder: Carson Helicopters Inc
SR04122NYPropellers
The Installation of Carson Helicopters, Inc. Composite Tail Rotor Blade and Pitch Sleeve, part number 428-600-1,.
FAA holder: Carson Helicopters Inc
SR02596SEOther aircraft modifications
Installation of Olympic Aero Services, Inc. Additional Telemetry Unit (ATU).
FAA holder: OLYMPIC AERO SERVICES INC.
SR02487NYAircraft performance
Increased Category A Performance for the Sikorsky S-61L, S-61N and S-61NM Helicopters.
FAA holder: Carson Helicopters, Inc
SR02583SECabin and interiors
Installation of a 9 passenger seat configuration for side-facing seats.
FAA holder: Croman Corporation
SR02507NYOther aircraft modifications
Installation of a 600 pound capacity Goodrich AC rescue hoist system P/N 44311-10-2.
FAA holder: Carson Helicopters, Inc
SR03664NYEngine and powerplant
Installation of the Engine Inlet Barrier Filter System (IBFS).
FAA holder: Coulson Aircrane Ltd.
SR02267SEOther aircraft modifications
Fabrication of replacement transmission fittings.
FAA holder: Croman Corporation
SR03310CHOther aircraft modifications
Installation of NASI Air Conditioning Module.
FAA holder: National Aircraft Service Inc
SH5125NMCargo and special mission
Installation of Croman 10,000 lbs. cargo sling system and associated fuselage mounting hardpoints.
FAA holder: Croman Corporation
SR02501LAElectrical systems
Removal of the Bendix 30E20-11-C 300 Amp Starter Generator and installation of the AMETEK Aerospace MG105A-1, 300 Amp Starter Generator.
FAA holder: Carson Helicopters, Inc
SR01426SECabin and interiors
Fabrication and installation of components for a left seat pilot-in-command operation.
FAA holder: Croman Corporation
SR01480SEFuel systems
Fabrication and installation of an external firefighting tank.
FAA holder: Carson Helicopters, Inc
SR02327AKCabin and interiors
Manufacture side-facing seat mounting structure.
FAA holder: Carson Helicopters, Inc
SR00319SEOther aircraft modifications
Modification of Part Number S6137-23009-6 main transmission rear cover per.
FAA holder: Croman Corporation
SR01534SEOther aircraft modifications
Installation of the transmission input modification to the main gear box.
FAA holder: Croman Corporation
SR02248SEOther aircraft modifications
Installation of a Supplemental Lighting System.
FAA holder: Aviation Specialties Unlimited Inc.
SR01853NYOther aircraft modifications
Installation of a SkyTrac ISAT-100 / ISAT-200 Airborne Position/Data Communicator.
FAA holder: SkyTrac Systems Ltd.
SR00465SECargo and special mission
Installation of a Mechanical Specialties Model 611 cargo hook.
FAA holder: Mechanical Specialties Inc
SR09232RCElectrical systems
Installation of a ground inverter.
FAA holder: Vector Aerospace Helicopter Services USA Inc.
SR09233RCOther aircraft modifications
Installation of a Solid State Voltage Regulator.
FAA holder: Vector Aerospace Helicopter Services USA Inc.
SR02190SEOther aircraft modifications
Installation of steel transmission fitting fabricated in accordance with Croman Drawing S-6120-62113-CRO41, Revision D, dated January 8, 1982, or later Federal Aviation Administration (FAA) approved revision; installed in accordance with Croman Installation Instructions S-6120-62113-CRO41-Inst, Revision IR, dated August 10, 2011, or later FAA- approved revision.
FAA holder: Croman Corporation
SR01771NYAircraft performance
Increase of Out of Ground Effect (OGE) Hover Performance.
FAA holder: Carson Helicopters Inc
SR02335AKFuel systems
Installation of two or three tank fuel quantity indicating systems when installed.
FAA holder: Carson Helicopters, Inc
SR02336AKAvionics
Installation of an Integrated Cockpit Display System (ICDS) with an Attitude and Heading Reference System (AHRS) for Dual Pilot Instrument Flight Rules Category A and B operation in accordance with Vector Aerospace Helicopter Services Inc. Master Drawing List , HP 61-34-33-105, Revision A, dated February 28, 2011, or later FAA approved revision.
FAA holder: Carson Helicopters, Inc
SR02999NYCargo and special mission
Installation of Auxiliary External Torque Gauge and External Load Meter in accordance with VIH Aerospace Inc., Master Document List VS61-0715J-MDL, Revision A, Dated January 24, 2011, approved by Transport Canada Civil Aviation (TCAA) on February 15, 2011, or later TCCA approved revisions.
FAA holder: VIH Aerospace Inc
SR02087SECabin and interiors
Limit the standard passenger seating configuration to 19 or less on the Sikorsky S-61N rotorcraft.
FAA holder: Croman Corporation
SR02832CHCabin and interiors
Installation of Brownlee seat track and SICMA TSO C39b or C127a Seats.
FAA holder: VIH Cougar Helicopters Inc
SR01585NYRotorcraft modifications
Installation of Carson Helicopters, Inc. composite main rotor blades, P/N 163-101-1.
FAA holder: Carson Helicopters Inc
SR02585NY-DElectrical systems
Installation of a concorde Battery Corporation Model RG-390E.
FAA holder: Keystone Helicopter Corp.
SR02681NYCabin and interiors
Installation of Aft Seat Shoulder Harness.
FAA holder: Cougar Helicopters Inc.
SR02672NYAvionics
Installation of the dual Garmin GNS-430 COM/NAV/GPS, dual GAD-42 Adapter, GTX 330 Transponder, Skywatch 497 Traffic Advisory, Artex 406HM ELT, and Garmin GMX-200 MFD.
FAA holder: VIH Aerospace Inc
SR02563NYOther aircraft modifications
Installation of RG-380E/44 Lead Acid Batteries.
FAA holder: VIH Aerospace Inc
SR02382NYAircraft performance
Increase of Out of Ground Effect (OGE) and In Ground Effect (IGE) Hover Performance for the Sikorsky S-61L, S-61N and S-61NM Helicopters.
FAA holder: Carson Helicopters Inc
SR02522NYOther aircraft modifications
Installation of a Collective Friction Lock.
FAA holder: Cougar Helicopters Inc.
SR02493NYOther aircraft modifications
The installation of FLIR 8500 and/or Spectrolab SX-16 Observation Systems.
FAA holder: VIH Aerospace Inc
SR02473NYOther aircraft modifications
Installation of a Sea Anchor.
FAA holder: Cougar Helicopters Inc.
SR02474NYElectrical systems
Installation of Sikorsky S-61 EMS Electrical Provisions.
FAA holder: VIH Aerospace Inc
SR02471NYEngine and powerplant
Installation of Diamond-J 61000-(103, 104) Power Turbine Inlet Temperature T5 Indicators (TIT).
FAA holder: VIH Aerospace Inc
SR02460NYOther aircraft modifications
Installation of Honeywell AR-Series CVR.
FAA holder: Maxcraft Avionics Ltd.
SR01288SEOther aircraft modifications
Fabrication of Ag-Air Systems Model 36000 Auxiliary Hydraulic System.
FAA holder: Kawak Aviation Technologies Inc
SR01739SECargo and special mission
Installation of a Mechanical Specialties, Inc. model 6111, 11,000 pound capacity cargo hook as a direct replacement for Breeze Eastern models SP-7070-2 or SP-7102-1 cargo hooks, and to be used with Carson Services, Inc. 11,000 pound capacity cargo sling (STC SH639NE) or Helipro Corporation International s 11,000 pound capacity cargo sling (STC SR00427SE).
FAA holder: Mechanical Specialties Inc
SR02338NYOther aircraft modifications
ONE-ONLY: Installation of a Sea Anchor, serial number 61762.
FAA holder: Cougar Helicopters Inc.
SA02279AKAvionics
Installation of dual Rockwell Collins FDS 2000 flight displays, dual AHS 3000 attitude and heading reference systems, dual Garmin GNS 530 navigation systems and supporting avionics equipment .
FAA holder: Acrohelipro Global Services USA Inc
SR02328NYFuel systems
ONE-ONLY: Installation of Auxiliary Fuel Tank, serial number 61761.
FAA holder: Cougar Helicopters Inc.
SR02327NYElectrical systems
Installation of Sikorsky S-61 EMS Electrical Provisions.
FAA holder: VIH Aerospace Inc
SR09218RCFuel systems
Installation of a fuel jettison system. (S-61N 61471, 61257, 61808).
FAA holder: Apical Industries Inc
SR01627SECabin and interiors
Limit the standard passenger seating configuration to 9 or less.
FAA holder: Croman Corporation
SH593EAOther aircraft modifications
Installation of Sperry C14A gyrosyn compass system.Descriptive data pertaining to this design change are considered inadequate for duplication in other products. This approval is limited to only the installation made in Sikorsky, S61N, Serial No 61424.
FAA holder: Garrett Aviation Services
SR09448RCElectrical systems
Installation of Concorde Battery Corporation Model RG-3BOE/44 Valve Regulated Sealed Lead Acid Battery.
FAA holder: Carson Helicopters Inc
SH639NECargo and special mission
Installation of 11,000 pound capacity cargo sling.
FAA holder: Carson Helicopters Inc
SR09231RCOther aircraft modifications
Installation of Smiths Industries Cockpit Voice Recorder in accordance with Master Drawing List ACRO 61-23-00-103, Rev NC, dated April 6, 1999, or later FAA approved revision.
FAA holder: Acrohelipro Global Services Inc
SR09234RCAvionics
Installation of Navigation Switching and GPS System in accordance with Master Drawing List ACRO 61-34-00-103, Rev A dated February 21, 2000, or later FAA approved revision.
FAA holder: Acrohelipro Global Services Inc
SR09235RCOther aircraft modifications
Installation of Litton T5PTIT Indicators in accordance with Master Drawing List ACRO 61-77-20-101, Rev. NC dated April 06, 1999, or later FAA approved revision.
FAA holder: Acrohelipro Global Services Inc
SR09237RCOther aircraft modifications
Installation of SFENA 904 Standby Attitude Indicator in accordance with Master Drawing List ACRO 61-34-00-101, Rev. NC dated January 28, 1999, or later FAA approved revision.
FAA holder: Acrohelipro Global Services Inc
SR09238RCAvionics
Installation of NAV/COM avionics package in accordance with Master Drawing List ACRO 61-23-00-101, Rev. B, dated February 21, 2000, or later FAA approved revision.
FAA holder: Acrohelipro Global Services Inc
SR02057NYOther aircraft modifications
Upgrade of the S6135-20600 series main gearbox by replacing input free-wheeling units in accordance with Carson drawing. IFWU INSTL Carson S-61 No. CHI-R-001, no revision, dated 12-15-04 and Carson Installation Instructions Report CHI-R-INSTALL, no revision, dated 12-14-04.
FAA holder: Carson Helicopters, Inc
SR01210NYPropellers
Extension of main rotor blade, P/N 61170-20201 series. For model S-61A, serial numbers 61-063, 61-147, 61-232, 61-272; for model S-61N, 61-216, 61-220, 61-242, 61-744; for model S-61R, 61-551.
FAA holder: Carson Helicopters, Inc
SR01749NYCabin and interiors
Removal of seats in passenger cabin to limit the maximum seating to nine passengers per Carson Helicopters, Inc. Report No. CHI-1000 latest revision. Limited to installation on serial numbers 61216, 61220, 61242, and 61744 ONLY that have been modified to short fuselage configuration.
FAA holder: Carson Helicopters, Inc
SR01653NYOther aircraft modifications
Installation of replacement seats per Amtech Aeronautical Limited Modification Data Summary MDS334201 latest Transport Canada approved revision.
FAA holder: Coulson Aircrane Ltd.
SR01538NYCargo and special mission
Installation of cargo door entry/exit steps.
FAA holder: Coulson Aircrane Ltd.
SR01401NYOther aircraft modifications
Installation of Chadwick-Helmuth HUMS System using Drawing No. CHS61-31-006, dtd 8/22/01.
FAA holder: Canadian Helicopters Limited
SR01392NYCargo and special mission
In accordance with Carson Services, Inc. Report CSI-01-1001 Revision A dated August 23, 2001, increase Category B takeoff and landing altitude limit to 12,000 ft Hd. In addition, increase enroute and external load altitude limit to 14,000 ft Hd.
FAA holder: Carson Helicopters, Inc
SR02373ATOther aircraft modifications
Manufacture of a titanium transmission support fitting assembly.
FAA holder: Clayton International Inc.