TC informed 'A' side cab door was loose.Fault recurred again at ORC NB. TC informed that he manuall y opened and closed cab door and there was a small gap. TC h ad to secure cab door by holding onto it. ~~~~~ TC informed 'A' side cab door was loose.     Check and found #3529 A/S cab door SSW having big gap in between the pressing device.Re-adjust the cab door top latch with apply locktie to screw and function test ok.DIR/DMI check ok. Done by Koh B.S. 21/11/21