I was doing a flight from LGSK to LGSM. The route is DCT KOROS G33 LUPIS G18 URNIL URNI2A. FMS was fully set up for the arrival and landing, I manually tuned the SAM VOR and set the radial 086 to fly from URNIL to SAM, and then switched NAV SRC back to FMS1 during the cruise.
While I was in the descent, enroute to URNIL from MES (I think), I pushed the heading sync button and then HDG button. Afterwards, I set the NAV SRC from FMS1 to VOR1. I then pressed the NAV button, thinking it would arm the mode to intercept the VOR radial but it didn't. I then pressed APPR button and then immediately got a freeze for a few seconds then CTD.
CL650_Log.txt