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
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
Fabrication of Helipro replacement windshields.
FAA holder: Croman Corporation
Installation of a Modular Harness.
FAA holder: Croman Corporation
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
Installation of Coulson Aircrane Limited (CAL) Hoist Replacement Parts.
FAA holder: Coulson Aircrane Ltd.
Installation of nine passenger seat configuration.
FAA holder: McHenry Priestley Aviation LLC
Fabrication of Onboard Systems Model 200-243-00 or 200-243-01 Cargo Hook Load Weigh System.
FAA holder: Onboard Systems International
Fabrication and installation of an external aerial liquid dispensing tank.
FAA holder: Carson Helicopters Inc
Installation of Garmin HTAWS (Helicopter Terrain Awareness Warning System).
FAA holder: Maxcraft Avionics Ltd.
Installation of NASI NREM18M Air Conditioning Module.
FAA holder: National Aircraft Service Inc. (NASI)
Increase of Out of Ground Effect (OGE) Hover Performance.
FAA holder: Carson Helicopters Inc
Installation of Olympic Aero Services, Inc. Additional Telemetry Unit (ATU).
FAA holder: OLYMPIC AERO SERVICES INC.
Increased Category A Performance for the Sikorsky S-61L, S-61N and S-61NM Helicopters.
FAA holder: Carson Helicopters, Inc
Installation of a 9 passenger seat configuration for side-facing seats.
FAA holder: Croman Corporation
Installation of a 600 pound capacity Goodrich AC rescue hoist system P/N 44311-10-2.
FAA holder: Carson Helicopters, Inc
Installation of the Engine Inlet Barrier Filter System (IBFS).
FAA holder: Coulson Aircrane Ltd.
Fabrication of replacement transmission fittings.
FAA holder: Croman Corporation
Installation of NASI Air Conditioning Module.
FAA holder: National Aircraft Service Inc
Fabrication and installation of an external firefighting tank.
FAA holder: Carson Helicopters, Inc
Manufacture side-facing seat mounting structure.
FAA holder: Carson Helicopters, Inc
Installation of a Supplemental Lighting System.
FAA holder: Aviation Specialties Unlimited Inc.
Installation of a Mechanical Specialties Model 611 cargo hook.
FAA holder: Mechanical Specialties Inc
Installation of a ground inverter.
FAA holder: Vector Aerospace Helicopter Services USA Inc.
Installation of a Solid State Voltage Regulator.
FAA holder: Vector Aerospace Helicopter Services USA Inc.
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Increase of Out of Ground Effect (OGE) Hover Performance.
FAA holder: Carson Helicopters Inc
Installation of two or three tank fuel quantity indicating systems when installed.
FAA holder: Carson Helicopters, Inc
View record
View record
Installation of Brownlee seat track and SICMA TSO C39b or C127a Seats.
FAA holder: VIH Cougar Helicopters Inc
Installation of Carson Helicopters, Inc. composite main rotor blades, P/N 163-101-1.
FAA holder: Carson Helicopters Inc
Installation of a concorde Battery Corporation Model RG-390E.
FAA holder: Keystone Helicopter Corp.
Installation of Aft Seat Shoulder Harness.
FAA holder: Cougar Helicopters Inc.
Installation of RG-380E/44 Lead Acid Batteries.
FAA holder: VIH Aerospace Inc
Installation of a Collective Friction Lock.
FAA holder: Cougar Helicopters Inc.
Installation of a Sea Anchor.
FAA holder: Cougar Helicopters Inc.
Installation of Sikorsky S-61 EMS Electrical Provisions.
FAA holder: VIH Aerospace Inc
Installation of Honeywell AR-Series CVR.
FAA holder: Maxcraft Avionics Ltd.
Fabrication of Ag-Air Systems Model 36000 Auxiliary Hydraulic System.
FAA holder: Kawak Aviation Technologies Inc
View record
ONE-ONLY: Installation of a Sea Anchor, serial number 61762.
FAA holder: Cougar Helicopters Inc.
ONE-ONLY: Installation of Auxiliary Fuel Tank, serial number 61761.
FAA holder: Cougar Helicopters Inc.
Installation of Sikorsky S-61 EMS Electrical Provisions.
FAA holder: VIH Aerospace Inc
Installation of a fuel jettison system. (S-61N 61471, 61257, 61808).
FAA holder: Apical Industries Inc
Limit the standard passenger seating configuration to 9 or less.
FAA holder: Croman Corporation
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
Installation of 11,000 pound capacity cargo sling.
FAA holder: Carson Helicopters Inc
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
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
Installation of cargo door entry/exit steps.
FAA holder: Coulson Aircrane Ltd.
Installation of Chadwick-Helmuth HUMS System using Drawing No. CHS61-31-006, dtd 8/22/01.
FAA holder: Canadian Helicopters Limited
Manufacture of a titanium transmission support fitting assembly.
FAA holder: Clayton International Inc.