Hey Crowman, thanks for trying to help! I also tried this. First of all: When I hold FCS BIT and push FCS RESET for a short time, nothing happens. When instead of pushing FCS RESET I hold it for a few seconds, I can activate the "Actuator Exerciser Mode" (NATOPS Flight Manual A1-F18AC-NFM-000, section2.8.2.4). The control surfaces then start moving for some time as intended, but the Xs are not cleared. Also when I again push FCS RESET, nothing is cleared. Also, during the BIT test, the ailerons are properly actuated, still the Xs won't clear.