Installation of the iPad Mount.
FAA holder: Avio Design Group Inc
Aircraft STC directory
Sikorsky Aircraft S-61L STCs
The Jun 30, 2026 FAA DRS snapshot contains 51 selected supplemental type certificates with status Current whose public applicability data names the Sikorsky Aircraft S-61L. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
51
listed Current at snapshot
15
holder directories
13
modification categories
Sep 30, 2025
latest recorded revision
Modification demand surface
Recorded holders
Croman Corporation11Carson Helicopters, Inc10VIH Aerospace Inc5Acrohelipro Global Services Inc5Maxcraft Avionics Ltd.3Vector Aerospace Helicopter Services USA Inc.2Coulson Aircrane Ltd.2Avio Design Group Inc1Peregrine1National Aircraft Service Inc1SkyTrac Systems Ltd.1Cougar Helicopters Inc.1Kawak Aviation Technologies Inc1Acrohelipro Global Services USA Inc1Canadian Helicopters Limited1
Recently revised S-61L STCs
Showing the 51 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 nine passenger seat configuration.
FAA holder: McHenry Priestley Aviation LLC
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)
Increased Category A Performance for the Sikorsky S-61L, S-61N and S-61NM Helicopters.
FAA holder: Carson Helicopters, Inc
One Helicopter-only conversion of Sikorsky Model S-61L S/N 61428 to an S-61N configuration.
FAA holder: Carson Helicopters, Inc
Installation of a 600 pound capacity Goodrich AC rescue hoist system P/N 44311-10-2.
FAA holder: Carson Helicopters, Inc
Fabrication of replacement transmission fittings.
FAA holder: Croman Corporation
Installation of NASI Air Conditioning Module.
FAA holder: National Aircraft Service 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.
Installation of two or three tank fuel quantity indicating systems when installed.
FAA holder: Carson Helicopters, Inc
View record
Installation of Carson Helicopters, Inc. composite main rotor blades, P/N 163-101-1.
FAA holder: Carson Helicopters Inc
Installation of a Collective Friction Lock.
FAA holder: Cougar Helicopters 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
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
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.