TC reported when train departing station, A-side cab door opened on its own. Fault did not recur. ~~~~~ 3567 TC reported when train departing station, A-side cab door opened on its own. Fault did not recur.  3567 A/S Cab door fault. Found locking mechanism securing screw dislodged.    Replaced screw & resured faulty part. Function checked -OK.Security checked -OK. Kiran/Kana 44524