Skip to content

Aircraft STC directory

Twin Commander Aircraft 680 STCs

The Jun 30, 2026 FAA DRS snapshot contains 35 selected supplemental type certificates with status Current whose public applicability data names the Twin Commander Aircraft 680. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

35
listed Current at snapshot
25
holder directories
8
modification categories
Jun 3, 2025
latest recorded revision

Modification demand surface

Other aircraft modifications12
Fuel systems7
Electrical systems5
Avionics4
Engine and powerplant3
Aircraft structures2
Landing gear and brakes1
Cabin and interiors1

Recorded holders

Signature Flight Support Corporation5Brittain Industries, Inc2BF Goodrich Aerospace2ROCKY TOP LEASING INC.2Aircenter Inc2Metzger James R2BHE & Associates LTD1Acron Aviation Inc.1FTG, Inc.1Kaman Corporation Aircraft Wheel and Brake LLC1Seaton Engineering Corp.1Paul/ Lanna Egan LLC1Hartzell Engine Technologies, LLC1Aircraft Components Inc1Twin Commander Aircraft LLC1Sabreliner Aviation LLC1P2 Incorporated1FFC Manufacturing1SMR Technologies Inc1Chelton Aviation Corporation1

Recently revised 680 STCs

Showing the 35 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