Hi, the second time on different Airports on Ground I had the following experience: When editing LEGS in FMC suddenly there was a little explosion in front of the Cockpit and then the FMC was confused. I was not able to finish the FMC Setting, I had to reboot the Computer. Is it a developer sign for a crashed FMC or what is it ??? It happens when I transfer a Leg in the scratchpad, switch one Page back and then transfer it to a discontinued part of the route. Achim PS: after that nothing typed in was shown in the scratchpad.PS2: To fast for ScreenshotPS3: 4th try to type in a Route from PAAT (ATU in FSX) to RJCC.Route: OPAKE NYMPH R220 NANNO OTR1 OBE every time a FMC-Crash.PS4: 5th try without Arrival and nocleared discount. I can start. Will enter Approach later....