Removed Narco MK12D & Narco ID824. Removed OEM Red Nav Light assembly. Installed Garmin GTR 225 Comm Unit P/N 011-02718-00 IAW Garmin TSO installation manual Garmin P/N 190-00182-02. Installed VAVionix SkyBeacon ADS-B out assembly #UAV-1001856-002 IAW SkyBeacon STC Installation Guide #UAV-1002305-001. ADS-B OUT system was shown to meet requirements of 14 CFR section 91.227. Electrical load analysis was computed and the above installation and existing electrical load does not exceed 80% of the alternator rated output. Weight and balance revised and equipment list amended. See FAA Forms 337 dated 1/28/2019 for GTR225 & SkyBeacon. Bay Avionics W.O.: #2567