Zafira,
Sad to hear about your cz110, mine is 8yrs old right now, about 2000 rds tru it and lots of dry fires. SN# is A1001, a batch ahead than yours. So fire no problem with its SA/DA action. just kept mine clean after range time at keep it lube as possible due to daily carry.
It might be the #54 part of the CZ110, the firing pin catch , this is the part that catches the firing pin when its cocked. mybe the spring that is pushing it upward malfunctioned. hope this helps.