TC reported 'A' side cab door unable toclose fully. TC secured cab door - ok. DIRBS operated - ok.  ~~~~~ 3531 - TC reported 'A' side cab door unable to close fully. TC secured cab door - ok. DIRBS operated - ok. L3 L3 Check and foun A side cab door unable to open/closed and the door was tilted up. Found Top double latch mounting screw dislodged and cab door roller misallignment cause cab door to jam. Double latch base bracket deform. Replace double latch base bracket, install and function test ok. DIR/DMI check ok. Cab door latch overlapping >5mm and sensing swictch fully flush. Both side DIRBS seal done. Done by Sanip/Koh/Jack 45168