A3 train doors of front M1 car not proven closed. TC opened and closed train doors twice - ok. ~~~~~ A3 train doors of front M1 car not prove     #1614-A3 CLE FC-063.No FOD observed.Door push pull before clean 8.2~8.8kg/After clean 5.5~6kg,DLS red line present,DES 14.5mm,door function and static test ok. Checked by Koh B.S. 07/05/23