DT519 TRAIN DOOR CLOSED FAILURE07:46:33 03 JULY 2021 TRAIN DOOR CLOSED AND LOCKED FAILURE DETECTED WHILE MOVING ~~~~~ DT519 TRAIN DOOR CLOSED FAILURE     Check and found #2519-B/S cab door SSW not fully engaged when manually push/pull cab door in locked position.Observed DIR intermittent lit/off.Also found #3520 A & B side same symptoms as mention on #3519.All mention SSW adjusted and function test ok. Done by Sanip/Koh. 04/07/21