Installation of 11,000 pound capacity Cargo Sling.
FAA holder: Carson Helicopters Inc.
Aircraft STC directory
Sikorsky Aircraft S-61A STCs
The cited FAA DRS record snapshots contain 26 selected supplemental type certificates with status Current whose public applicability data names the Sikorsky Aircraft S-61A. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
26
listed Current at snapshot
6
holder directories
9
modification categories
Oct 5, 2026
latest recorded revision
Modification demand surface
Recently revised S-61A STCs
Showing the 26 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
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
Fabrication and installation of an external aerial liquid dispensing tank.
FAA holder: Carson Helicopters Inc
Installation of NASI NREM18M Air Conditioning Module.
FAA holder: National Aircraft Service Inc. (NASI)
Installation of T58-GE-402 engines.
FAA holder: Croman Corporation
Installation of Croman Corporation Electric Heater.
FAA holder: Croman Corporation
Increase of Out of Ground Effect (OGE) Hover Performance.
FAA holder: Carson Helicopters Inc
Installation of a shorter composite blade.
FAA holder: Carson Helicopters, Inc
Fabrication and installation of an internal fire retardant tank.
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 Observer Seat CRCS100-01.
FAA holder: Croman Corporation
Installation of S-61L fixed main landing gear.
FAA holder: Croman Corporation
Fabrication of replacement transmission fittings.
FAA holder: Croman Corporation
Installation of NASI Air Conditioning Module.
FAA holder: National Aircraft Service Inc
Increase of Out of Ground Effect (OGE) Hover Performance.
FAA holder: Carson Helicopters Inc
Fabrication and installation of an internal fire retardant tank.
FAA holder: Croman Corporation
Installation of Carson Helicopters, Inc. composite main rotor blades, P/N 163-101-1.
FAA holder: Carson Helicopters Inc
Fabrication of Ag-Air Systems Model 36000 Auxiliary Hydraulic System.
FAA holder: Kawak Aviation Technologies Inc
Installation of a Mechanical Specialties, Inc. model 6111, 11,000 pound capacity cargo hook.
FAA holder: Mechanical Specialties 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