TC reported cab door not proven closed.TC opened and closed once - ok. ~~~~~ FOUND CAB 3504 B SIDE CAB DOOR RIGGED FAILED.DIR ABLE TO EXTINGUISH BEFORE DOOR IS FULLY CLOSED.CHECKED A SIDE OK.ADJUSTED DOOR B SIDE DCSS TO ACTIVATE ONLY WHEN DOOR IS FULLY LATCHED.CHECKED ALL DOORS FOR SIGN OF RUBBING AND MATIG STRIP GAP OK.CARRIED OUT DOOR CYCLIC CHECK 20 TIMES OK.BASSANT 15.09.2021