TC reported intermittent DIR, train didnot EB. Performance ok ~~~~~ CHECKED ALL SALOON DOOR IN CLOSE POSITION OK. CHECK 3554 CAB DOOR OK. 3553 B-SIDE CAB DOOR OK. A-SIDE DOOR FAIL. HORIZONTAL GAP BETWEEN LATCH TO CATCH TOO BIG AND DCS SENSING SWITCH ACTIVATED DURING DOOR SHAKING. OVER LAP BETWEEN LATCH AND CATCH >6MM. ADJUSTED THE CATCH. BRING NEAR TO LATCH. FUNCTION TEST OK. SECURITY CHECK OK. IBRAHIM/RAGHU. 23.06.2021.