Installation of TSIO-520-N or TSIO-520-NB engines.
Installation of Continental TSIO-520-E or -EB engine.
Installation of Hartzell model PHC-C3YF-2UF/FC7693DF or PHC-C3YF-2UF/FC7693DFB propellers
Installation of Lycoming IO-540- A1A5 powerplants and Hartzell HCA3XK-2B/7636D propellers.
Installation of detachable lead strap propeller deicers.
Installation of Woodward electronic propeller synchraphaser system.
Installation of Graphic Engine Monitors (GEM) Models GEM-610 and GEMINI 1200.
Installation of Woodward Type II electronic propeller synchronizer or synchrophaser system. (G-44A MODIFIED COLEMILL - STC 2-13) (500-A modified - Colemill STC SA340SO)
Installation of two Lycoming TIO-540-A2B turbocharged engines and two Hartzell HC-E3YR-2/C8468-6R propellers; or installation of Lycoming TIO-540-J2BD or –N2BD and LTIO-540-J2BD or –N2BD engines with Hartzell HC-E3RY-2F/FC8468-6R or -8R and HC-E3YR-2LF/FJC8468-6R or -8R propellers and gross weight