Rear cab entry indication illuminated. TC changed end and checked and feedback 'B' side partition do or was opened. TC checked and confirmed no unauthorized pers on, no suspicious item and all switches (sealed and unsealed ~~~~~ Rear cab entry indication illuminated. T Confirmed #3510 B/S cab door unable to latch positively if closed with insufficent force.Further check found #3510-B/S cab door double latch positioned too forward.Adjusted latch backward by approx 5mm.Cab door was able to close & latch securely with no door gap.Conducted pull test-no intermittent DIR.DIR/DMI/Tims indications ok.Checked other cab doors-ok.Side finding found #3510 B/S door leaf partition door screw loose-tighented on and door able to close & lock. Done by Lin J.H./Benjamin. 09/02/22