Removal of propeller unfeathering valve, installation of enlarged rudder trim tab, installation of electric hydraulic pump, installation of volt/amp meter, installation of aux wing float fuel system, installation of sun visors, installation of solid rubber tail wheel/tire assembly, installation of a defroster blower and installation of Weldon fuel boost pumps View PDF on drs.faa.gov ↗

The STC PDF is authoritative: installation instructions, ICA requirements and limitations.