TC reported "A" side cab door 3517 double latch mechanism faulty.@ 2234Hrs. Replacement train from TWD. TC reported "A" side cab door 3517 double latch mechanism faulty. ~~~~~ #3517 A SIDE DOUBLE LATCH MECHANISM DISLODGE FIXED BACK AND RETIGHTEN THE LATCH.FUNCTION TEST OK.SECURITY CHECKED OK.GANESAN/HAIRUL S   09.02.2023