1. FAA STC SA2478SW Installation of Lycoming IO-720-B1B Normally Aspirated engines on 500S Aero Commanders with GW increase from 6750lb to 7800 lb. Turbocharged version with GW to 8000 lb.
2. FAA STC SA2691WE Installation of Lycoming. IO-720-B1B or B1BD Turbocharged engines on 500S, 680F & 560F Aero Commanders, GW 8000 lb. Could be increased to 8450 lb.
3. FAA STC SA2891SW Installation of Lycoming IO-720-B1B engines on 680FL, FL (P) and 680F (P) Commanders with GW 8450 lb.
4.RESERVED
5. FAA STC SE62WE Installation of Rajay Turbochargers on Lycoming IO-720-B1B & B1BD engines.
6. FAA STC SA3405SW Installation of 56-gallon fuselage fuel tank 560Fand 680F.
7. FAA STC SA964SW increase Gross weight from 8000 to 8450 on 680FL.
8. FAA STC SA529WE for the 500S, B, U, with the IO 540 290 hp engines to install turbochargers, remote oil cooler. (Increased gross weight available for this STC).
9. COMMING SOON Installation of TIO540J2B 350 hp 500S,B,U, 560F, 680F,FL,FL(P)
