TC reported rear DT A1 door not proven closed. TC cycled train doors a few times to clear fault. Fau lt did not recur at BSH & BDL SB IMDC RS informed.replaced at JUTMT with spare train launched from UPD. ~~~~~ 3625 TC reported A1 door not proven closed. TC cycled train doors a few times to clear fault. Fault did not recur at BSH & BDL SB IMDC RS informed. Train was replaced at JUTMT with spare train launched from UPD. CE: 3625 A1 door proven open and closed  3625 A1 Door Checked for FOD - OK. Door roller checked - OK. No delamination Door leaf gap 63mm. Door lock switch rigging out-Readjust door lock switch rigging. Function test door operation-OK. Swop DCP as preventive measure . 3625:A1 DCP 1503W20001S011 3625:B1 DCP 150W020001S007 Alan/Anand/Au TK 45220