'A' side cab door opened by itself whentrain depart from station. TC was able to secure the cab doo r.rom BSD. ~~~~~ 'A' side cab door opened by itself when     #3553-A/S cab door found latching overlap fail,add shim to latch bracket mounting and function check ok.DIR ok. Ops0020 raise to follow up. Done by Jack. 16/04/23 3553 A side cab door to adjust cab door tongue Removed #3553 A/S cab door to extract out the torgue and adjusted torgue to be slighly higher along the rotating gear.Reinstalled cab door and function test ok.Lowered double latch by adding 2mm shims on the 3 mounting screws and rigged the door sensing s/w accordingly,function test ok.Overlap with door torgue 8.2mm,clearance between double latch and cab door-3.74mm Done by Koh.  19/04/23