Aircraft STC directory
Boeing DC3C-S1C3G STCs
The Jun 30, 2026 FAA DRS snapshot contains 90 selected supplemental type certificates with status Current whose public applicability data names the Boeing DC3C-S1C3G. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
Modification demand surface
Recorded holders
Recently revised DC3C-S1C3G STCs
Showing the 90 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
Installation of a Garmin GTS 8000 Traffic Alert and Collision Avoidance System (TCAS) II.
FAA holder: Preferred Improvements LLC
Installation of Underside Roller Doors.
FAA holder: Basler Turbo Conversions LLC
Installation of the Nexus NX301001 air conditioning system.
FAA holder: Nexus Climate Control LLC
Installation of an EO/IR System.
FAA holder: Basler Turbo Conversions LLC
Installation of Airwolf Filter Corp. Air Oil Separator.
FAA holder: Airwolf Filter Corporation
Installation of long range fuel system.
FAA holder: Greenwich Aircraft Corporation
Installation of a bleed air activated vacuum system.
FAA holder: Greenwich Aircraft Corporation
Removal of lead ballast from front and aft faces of original firewalls.
FAA holder: Greenwich Aircraft Corporation
Installation of Gustin Aviation chip detector light system.
FAA holder: A & L Aircraft Parts Inc
Installation of 145-gallon fuel tanks. Installation of 252-gallon fuel tanks.
FAA holder: Preferred Improvements LLC
Installation of a Garmin Traffic Collision Avoidance System (TCAS) II with ADS-B Out Capability.
FAA holder: Basler Turbo Conversions
Installation of Provisions for a Light Detection and Ranging (LIDAR) System.
FAA holder: Basler Turbo Conversions LLC
Install placarding to restrict total payload to a maximum of six thousand pounds (6,000 lbs).
FAA holder: Preferred Improvements LLC
Installation of an Ultra-Wide band (UWB) Fuselage Antenna Array.
FAA holder: StandardAero Business Aviation Services, LLC
A.P.U. Installation - Ranger Andover Model V-32D-2-1.
FAA holder: Preferred Improvements LLC
Installation of RCA Model AVQ-10 radar antenna swingaway mount SK10136 (SA3-65).
FAA holder: Preferred Improvements LLC
Installation of standard C-47 cargo door.
FAA holder: Preferred Improvements LLC
Installation of wheel well enclosure doors.
FAA holder: Preferred Improvements LLC
Installation of bird resistant windshield.
FAA holder: Preferred Improvements LLC
Picture window installation and standard window modification.
FAA holder: Preferred Improvements LLC
Installation of electrically driven emergency hydraulic pump.
FAA holder: Preferred Improvements LLC
Alternate Tee-Bolt radome attachment for STC SA3-52 radome installation.
FAA holder: Preferred Improvements LLC
Installation of a Gear Latch & Ground Shift system.
FAA holder: Preferred Improvements LLC
Installation of a Fairchild F800 or F1000 digital flight data recorder.
FAA holder: Preferred Improvements LLC
This modification requires that the following two (2) placards be placed on the inside of the forward (L.H.) cargo door in full view of the cargo loading crew: MAXIMUM PAYLOAD CAPACITY -7500 lbs. or less, CARGO LOADING METHOD-Refer to FAA App Oper Handbk.
FAA holder: Preferred Improvements LLC
Installation of SkyTrac ISAT Airborne Position/Data Communicator.
FAA holder: SkyTrac Systems Ltd
Installation of tail wheel cover and fairing.
FAA holder: Preferred Improvements LLC
Installation of a Traffic Collision Avoidance (TCAS II) System.
FAA holder: Basler Turbo Conversions LLC
Installation of a Digital Flight Data Recorder (DFDR) System.
FAA holder: Basler Turbo Conversions LLC
Installation of Ice Protection Systems.
FAA holder: Preferred Improvements LLC
Installation of a Flap and Landing Gear Aural Warning System.
FAA holder: United Aeronautical Corporation
Installation of Superflite 102 fabric.
FAA holder: Aviation Products Systems Inc.
Installation of Curtis-Wright C-46 pilot and copilot seats.
FAA holder: Sabreliner Aviation LLC
Installation of dual Stewart-Warner Model 940-B24 cabin heaters.
FAA holder: Sabreliner Aviation LLC
Installation of Stewart-Warner Model 940-B24 cabin heater.
FAA holder: Sabreliner Aviation LLC
Installation of vacuum pump and vacuum system.
FAA holder: Sabreliner Aviation LLC
Standard installation - swivel chair assembly.
FAA holder: Sabreliner Aviation LLC
Installation of short exhaust stack (simplified version).
FAA holder: Sabreliner Aviation LLC
Standard seat track installation for SK10187 swivel seat.
FAA holder: Sabreliner Aviation LLC
Installation of Generator over-heat temperature indicator system.
FAA holder: Sabreliner Aviation LLC
Installation of airstep door safety chair and release mechanism.
FAA holder: Sabreliner Aviation LLC
Nacelle modification and installation of short exhaust stacks.
FAA holder: Sabreliner Aviation LLC
Typical installation of Burns Aero seat.
FAA holder: Sabreliner Aviation LLC
Installation of AiResearch oil cooler.
FAA holder: Sabreliner Aviation LLC
Installation of Cockpit side windows.
FAA holder: Sabreliner Aviation LLC
Installation of Janitrol heater.
FAA holder: Sabreliner Aviation LLC
Three-place divan assembly and installation.
FAA holder: Sabreliner Aviation LLC
Installation of a windshield carburetor propeller alcohol system.
FAA holder: Sabreliner Aviation LLC
Installation of cabin heater, Stewart-Warner 940-B24.
FAA holder: Sabreliner Aviation LLC
Bendix RDR-1 radar antenna ANT-1C installation.
FAA holder: Sabreliner Aviation LLC
Alternate landing light installation (Westinghouse 600W seal beam).
FAA holder: Sabreliner Aviation LLC
Installation Of Oilamatic Preoiler system.
FAA holder: Oilamatic Inc
Installation of carburetor adapter.
FAA holder: Signature Flight Support Corporation
Manufacture of alcohol under wing to fuselage fillet tanks, P/N 352581, to replace Douglas alcohol tanks P/N 5161344 or 5188619, and mounting bracket P/N 352573 replacing the Douglas brackets P/N 5161873-46, -48, -52, -54 and Douglas P/N 4161884 and 4161882.
FAA holder: Signature Flight Support Corporation
Install aft baggage compartment support structure.
FAA holder: Signature Flight Support Corporation
The exhaust tail pipe installed.
FAA holder: Signature Flight Support Corporation
The fuselage structure altered to incorporate a window between Station 492 and 506.
FAA holder: Signature Flight Support Corporation
Fuselage structure modified R & L side to incorporte enlarged windows and relocation of the cabin emergency exit.
FAA holder: Signature Flight Support Corporation
Altered the fuselage structure to incorporate enlarged windows.
FAA holder: Signature Flight Support Corporation
Original hydraulic reservoir and support structure removed.
FAA holder: Signature Flight Support Corporation
A 200 amp generator system installation.
FAA holder: Signature Flight Support Corporation
Installation of R&L cockpit window.
FAA holder: Signature Flight Support Corporation
The landing light mounting in each outer wing panel leading edge altered.
FAA holder: Signature Flight Support Corporation
Installation of Surface Combustion Heater, P/N A97A28 and related equipment.
FAA holder: Signature Flight Support Corporation
Structural modification to nacelle aft of firewall to eliminate the exhaust trough cut out.
FAA holder: Signature Flight Support Corporation
Installation of 200 amp generator system with over voltage control.
FAA holder: Signature Flight Support Corporation
Installed additional structure to support Warren McArthur seat Model 192.
FAA holder: Signature Flight Support Corporation
Installation of camera hole cut out in lower fuselage structure.
FAA holder: Signature Flight Support Corporation
Installation of 300 amp generator system.
FAA holder: Signature Flight Support Corporation
Installation of Bendix Avia. Corp. (Eclipse-Pioneer) fuel flow system, transmitter 9100-5, indicator 6300 (100-1000 lbs. per hour).
FAA holder: Signature Flight Support Corporation
Installation of chairs and floor structure.
FAA holder: Signature Flight Support Corporation
Installation of fuel flow system.
FAA holder: Signature Flight Support Corporation
Installed a positive stop in the rudder system.
FAA holder: Signature Flight Support Corporation