Train EB was applied while departing station in Auto mode. Released EB - ok. ~~~~~ Train EB was applied while departing sta     #3629 Cab door latch missing.Retrived original latch,set screw intact.Checked lock cylinder screw thread and latch female screw thread in good condition,no abnormalities with the operation of the lock cylinder.Set screw in good condition.No loctide thread locker found previously.Reinstalled door latch with loctide threadocker on lock cylinder screw and set screw.Cyclic test and security check ok. Done by Luke. 16/02/23