SA8453SWLanding gear and brakes
Replace the o-ring seals in the landing gear lower strut.
FAA holder: Metrea Special Aerospace ISR Inc.
Aircraft STC directory
Twin Commander Aircraft 500-A STCs
The Jun 30, 2026 FAA DRS snapshot contains 31 selected supplemental type certificates with status Current whose public applicability data names the Twin Commander Aircraft 500-A. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
31
listed Current at snapshot
22
holder directories
10
modification categories
Apr 29, 2025
latest recorded revision
Modification demand surface
Other aircraft modifications13
Fuel systems5
Landing gear and brakes3
Engine and powerplant2
Flight controls2
Aircraft structures2
Aircraft connectivity1
Electrical systems1
Aircraft performance1
Cabin and interiors1
Recorded holders
Merlyn Products Inc.3Kaman Corporation Aircraft Wheel and Brake LLC2Brittain Industries, Inc2BF Goodrich Aerospace2Signature Flight Support Corporation2Metrea Special Aerospace ISR Inc.1TALCO Aviation1FTG, Inc.1S-TEC Corporation1Avidyne Corporation1Hartzell Engine Technologies, LLC1Aircraft Components Inc1Twin Commander Aircraft LLC1Commuter Air Technology Inc1Mike Jones Aircraft Sales Inc.1ROCKY TOP LEASING INC.1Aircenter Inc1Saint-Gobain Performance Plastics Corp1Machen Inc1Floats & Fuel Cells1
Recently revised 500-A STCs
Showing the 31 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
SA683WEOther aircraft modifications
Installation of turbocharged Continental IO-470-M engines.
FAA holder: TALCO Aviation
SA1686WEEngine and powerplant
Installation of Vibration Isolation Products (VIP) engine mount P/Ns VIP 50525-1 and VIP 50545-1 on various aircraft as shown on FAA Approved Model List (AML) No. SA1686WE.
FAA holder: FTG, Inc.
SA706GLLanding gear and brakes
Install Cleveland conversion kit P/N 199-122 (for aircraft using MIL-H05606 brake fluid), or199-122A (for aircraft using 'Skydrol' brake fluid).
FAA holder: Kaman Corporation Aircraft Wheel and Brake LLC
SA1457GLLanding gear and brakes
Installation of a Cleveland nose wheel.
FAA holder: Kaman Corporation Aircraft Wheel and Brake LLC
SA09763DSFlight controls
Installation of an S-TEC 01326 Digital Flight Control System (DFCS).
FAA holder: S-TEC Corporation
SA09906ACOther aircraft modifications
Reduce maximum number of seats to 5 passenger seats with a total occupancy maximum of 6 occupants.
FAA holder: Direct-To Aviation Services Inc
SA00382BO (PAGE 2)Aircraft connectivity
Installation of Globalstar Antenna and Cradle provisions to support a Globalstar GPS-1700 in non-composite airplanes.
FAA holder: Avidyne Corporation
SA1847WEOther aircraft modifications
Installation of Brittain Up-Command Signal Adapter Kit.
FAA holder: Brittain Industries, Inc
SA4-1414Flight controls
Installed Brittain Industries, Inc., B2D Flight Control System.
FAA holder: Brittain Industries, Inc
SA01660CHOther aircraft modifications
Remove Janitrol P/N C15C54 or Twin Commander P/N 88035-5 combustion heater and install C&D Associates, Inc. Model CD35K heater kit 10 P/N CD12043K10.
FAA holder: Hartzell Engine Technologies, LLC
SA02547AT (PG 3)Other aircraft modifications
Installation of a Voice Alert System.
FAA holder: Aircraft Components Inc
SA260SWElectrical systems
Installation of a Protective Device in the ground side of the Battery and External Power relays.
FAA holder: Twin Commander Aircraft LLC
SA1445SWOther aircraft modifications
Modification of Mitchell automatic flight system AK221 installed per STC SA680SW.
FAA holder: Commuter Air Technology Inc
SA404CEAircraft structures
Installation of Hoskins supplemental position light system which includes Model A wing tip lights and Model D or K(dual) tail light.
FAA holder: BF Goodrich Aerospace
SA90CEAircraft structures
Installation of Hoskins Supple- mental Model A or B, high intensity wing tip lights, Model C tail light, with or without Models 1 or 2 high intensity fuselage lights.
FAA holder: BF Goodrich Aerospace
SA366SOAircraft performance
Gross weight increased to 6530 pounds.
FAA holder: Mike Jones Aircraft Sales Inc.
SR02088SEOther aircraft modifications
Installation of Hartzell PHC-C3YF-2UF/FC8468D( )-8R propellers and C-3567-4P spinners.
FAA holder: Palm Beach Aviation Services Inc.
SA00794CHFuel systems
Replace Twin Commander fuel cap assembly with Shaw Aero Devices Fuel Cap (P/N 416-50) and adapter (P/N 416-938).
FAA holder: Commander Aero Inc
SA02013SEEngine and powerplant
Modification of the fuel system, structures, and engine installation.
FAA holder: Merlyn Products Inc.
SA4-1234Fuel systems
Installation of electrical low fuel warning device to indicate last 25 gallons of useable fuel in main (center) tank.
FAA holder: ROCKY TOP LEASING INC.
SA01222SEFuel systems
Modification of the existing fuel system to increase its capacity.
FAA holder: Merlyn Products Inc.
SA01841SEOther aircraft modifications
Installation of Teledyne Continental engines modified.
FAA holder: Merlyn Products Inc.
SA1-143Other aircraft modifications
Installation of Chamberlain 2001X series radome kits.
FAA holder: Saint-Gobain Performance Plastics Corp
SA00695SEOther aircraft modifications
Replacement of certain Rotomaster and Rayjay scavenge pumps.
FAA holder: Machen Inc
SA8597SWFuel systems
Installation of P/N DF062-507, upper center fuel tank bladder cells as a replacement for original bladder P/N 5630062-507.
FAA holder: Floats & Fuel Cells
SA1662SWFuel systems
Installation of outboard fuel system.
FAA holder: Signature Flight Support Corporation
SA454SWOther aircraft modifications
Installation of windshield alcohol system.
FAA holder: Signature Flight Support Corporation
SA1017EAOther aircraft modifications
Installation of vertical tail floodlights.
FAA holder: DeVore Aviation Corporation of America, a New Mexico Corporation