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Aircraft STC directory

Twin Commander Aircraft 680T STCs

The Jun 30, 2026 FAA DRS snapshot contains 9 selected supplemental type certificates with status Current whose public applicability data names the Twin Commander Aircraft 680T. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

9
listed Current at snapshot
5
holder directories
5
modification categories
Sep 19, 2022
latest recorded revision

Modification demand surface

Landing gear and brakes2
Fuel systems2
Other aircraft modifications2
Flight controls2
Electrical systems1

Recorded holders

Kaman Corporation Aircraft Wheel and Brake LLC2Floats & Fuel Cells2Gulfstream Aerospace Corporation2Rockwell Collins Inc2Paul/ Lanna Egan LLC1

Recently revised 680T STCs

Showing the 9 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.

SA1177GLElectrical systems

Install Aero Medical Products Mfg., Inc. Air Ambulance Stretcher P/N 125 using Installation Kit P/N 800 in accordance with Installation and Operating Instructions, Form EA 109K, dated April 23, 2001, or later FAA approved revisions. The Medical Oxygen System Kit P/N 807 is an FAA approved option. The Inverter/Pump Kit No. 812 may be installed in accordance with Inverter/Pump Installation Instructions, EA Form 170, dated June 9, 2001, or later FAA approved revisions.

FAA holder: Paul/ Lanna Egan LLC

View record