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Type certificate 2A4

Held today by Twin Commander Aircraft LLC, earlier by Gulfstream, Aero Commander, Rockwell\Twin Commander Aircraft Corporation, Gulfstream\Aero Commander\Rockwell. It covers 21 models; about 51 aircraft on the U.S. register are built to it. Last revised November 18, 2024 (revision 50). 19 FAA orders name its designs, and 474 approved modifications build on it.

Models under this certificate 21

680-V, 680-F(P), 680-F, 680-E, 695B, 690C, 560-F, 720, 690A, 680-W, 690D, 690B, 680-FL(P), 695, 680-FL, 680, 681, 685, 695A, 690, 680-T

On this site

Aero Commander 680 51 registered

The data sheet on the FAA's site: the approved engines and propellers, weights, speeds and limits for each model.

FAA orders on these designs 19 · newest first

2005-10-142005-18-20 · "FASTprop" propeller de-icers · propeller
2005-02-232005-01-19 · Mode S transponders · instruments and avionics
2000-03-242000-02-30 · Airframe Pneumatic Deicing Boots · heating, ice protection and utility systems
1998-11-0398-20-34 · Airplane Flight Manuals--Severe Icing Conditions · flight controls
1998-08-1698-14-03 · Transponders · instruments and avionics
1998-05-2998-07-17 · Flap System · flight controls
1998-05-1898-08-19 · Wing to Fuselage Attachment Brackets and Straps · airframe structure
1994-04-1594-04-17 · Flap System Cable · flight controls

Approved modifications 474 · companies holding the most

Signature Flight Support Corporation 17Garmin International INC 15Bf Goodrich Aerospace 14Aircenter, INC 13J P Instruments 11Avidyne Corporation 10S-Tec Corporation 9Commuter Air Technology INC 9

Source: FAA type certificate data sheets (Dynamic Regulatory System); register counts from the FAA register of October 5, 2026. Connections as data: /graph/certificate/2A4.json.