SA11300DSAvionics
Upgrade previously installed Collins Aerospace Radar Altimeter.
FAA holder: BHE & Associates Ltd.
Aircraft STC directory
Twin Commander Aircraft 680-FL STCs
The Jun 30, 2026 FAA DRS snapshot contains 24 selected supplemental type certificates with status Current whose public applicability data names the Twin Commander Aircraft 680-FL. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
24
listed Current at snapshot
19
holder directories
9
modification categories
Jun 3, 2025
latest recorded revision
Modification demand surface
Other aircraft modifications7
Fuel systems4
Avionics3
Cargo and special mission3
Aircraft structures2
Engine and powerplant2
Landing gear and brakes1
Electrical systems1
Cabin and interiors1
Recorded holders
Commuter Air Technology Inc4BF Goodrich Aerospace2BHE & Associates LTD1Metrea Special Aerospace ISR Inc.1Acron Aviation Inc.1Hartzell Engine Technologies, LLC1Aircraft Components Inc1Twin Commander Aircraft LLC1Brittain Industries, Inc1P2 Incorporated1FFC Manufacturing1ROCKY TOP LEASING INC.1RPM Commander LLC1Ontic Engineering and Manufacturing Inc.1Saint-Gobain Performance Plastics Corp1Aircenter Inc1Quiet Flight LLC1Signature Flight Support Corporation1DeVore Aviation Corporation of America, a New Mexico Corporation1
Recently revised 680-FL STCs
Showing the 24 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
SA8408SWLanding gear and brakes
Replace the o-ring seals in the landing gear lower strut seal.
FAA holder: Metrea Special Aerospace ISR Inc.
SA02738CH (PAGE 3)Avionics
Installation of L-3 Communications Avionics Systems.
FAA holder: Acron Aviation 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
SA600WEAvionics
Installation of Brittain Industries, Inc. Model B-4 Flight Control System including Model PC-1 Pitch Assist, Model AH-1 Altitude Hold and NAV-1 Navigation Coupler.
FAA holder: Brittain Industries, Inc
SA418SWCabin and interiors
Seat-passenger lavatory combination.
FAA holder: Commuter Air Technology Inc
SA439SWCargo and special mission
Installation of an RC-8 aerial survey camera.
FAA holder: Commuter Air Technology Inc
SA478SWCargo and special mission
Installation of RC-7/RC-9 aerial survey camera.
FAA holder: Commuter Air Technology Inc
SA408SWCargo and special mission
Installation of an RC-8 aerial survey camera.
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
SA91CEAircraft structures
Installation of Hoskins Supple- mental Model A or B high intensity wing tip lights.
FAA holder: BF Goodrich Aerospace
SA02110CH (PAGE 4)Other aircraft modifications
Installation of a Time Trac Data Recorder.
FAA holder: P2 Incorporated
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
SA01956AT-DFuel systems
Installation of replacement fuel cell assemblies.
FAA holder: FFC Manufacturing
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.
SA2891WEEngine and powerplant
Installation of Lycoming IO-720-B1B turbocharged engine.
FAA holder: RPM Commander LLC
SA231CEEngine and powerplant
Twin engine synchronizer.
FAA holder: Ontic Engineering and Manufacturing Inc.
SA1-143Other aircraft modifications
Installation of Chamberlain 2001X series radome kits.
FAA holder: Saint-Gobain Performance Plastics Corp
SA1089SWFuel systems
Installation of 59 gallon wing auxiliary fuel tank according to Drawing List 60400 dated 10/5/69, revised 5/1/70.
FAA holder: Aircenter Inc
SA00481DEOther aircraft modifications
Installation of an Aircraft Noise Control (ANC) System.
FAA holder: Quiet Flight LLC
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