Train door not proven closed at Rear DT,A1 door. TC opened and closed few times - ok. ~~~~~ Train door not proven closed at Rear DT,     Check Tims observed #3629-A4 door CLE 2x times.No FOD observed at bottom guide rail.Door mating strip check within cateria.Pus/Pull resistance 4.2kg-4.8kg ok.Further check found DCS gap 15.2mm out of cateria,adjust to 14.6mm function test ok. DLS & DLD check ok.Door cyclic test ok.Door static test pass. Done by Sanip/Faddzal/Deeshan. 12/01/21