STC SA231CE
FAA DRS lists SA231CE as Current · Reissued, held by Ontic Engineering and Manufacturing Inc., for Twin Commander Aircraft 560-F, Twin Commander Aircraft 680-F, and Twin Commander Aircraft 680-FL. Recorded change: Twin engine synchronizer. Snapshot dated June 30, 2026.
Recorded modification
What the FAA record covers
Twin engine synchronizer.
SA231CE identifies the approval, recorded holder, named aircraft, and modification scope. It does not confirm kit availability, serial-number effectivity, data rights, price, or installation authority.
Applicability
Aircraft named in FAA DRS
Named aircraft: Twin Commander Aircraft 560-F, Twin Commander Aircraft 680-F, and Twin Commander Aircraft 680-FL. Confirm the approved model list, serial effectivity, configuration, and certificate revision.
Buyer checks
Confirm before sourcing
- 01Does it cover the exact Twin Commander Aircraft 560-F and Twin Commander Aircraft 680-F, and 1 more aircraft configuration model, serial range, and configuration?
- 02Which powerplant configuration, limits, instruments, and maintenance data apply?
- 03Who can legally supply the design data, kit, instructions, and ICAs?
- 04What parts, labor, conformity, and return-to-service work are excluded?
Related engine and powerplant STCs
Install Pratt & Whitney Canada PT6A-25C engine and Hartzell HC-B3TN-2/T10178(N)-8R propeller.
FAA holder: Sierra Industries Ltd.
Addition of fowler wing flaps, elevator trim spring with cockpit tension select lever, fuselage strakes, and nacelle strakes.
FAA holder: Sierra Industries Ltd.
Installation of the Continental Motors IO-520-D engine and a Hartzell PHC-J3YF-1RF/F8468A-6R propeller.
FAA holder: James A. Ridpath, Jr.
Alteration of a Beechcraft Corporation 400A airplane, to replace Pratt & Whitney JT15D-5 series engines with Williams International FJ44-3AP engines (TCDS E3GL) with Full Authority Digital Engine Control (FADEC) and associated systems (Config. A) and (/or) the installation of Nextant Winglets (Config. B).
FAA holder: Nextant Aerospace