Train doors at car 1631 B3 doorwere not proven closed. TC recycled train doors once - ok. Fault di d not recur at subsequent stations. ~~~~~ Train doors at car 1631 B3 door  were no     Check Tims found FC953 B2 door close operation time out CLE.Check #1631-B3 door DLS plunger slighly out of criteria,adjusted ok.DLD cushion check satis.Further check on DCS 16.01mm out of criteria ,adjusted to 15mm-ok.Mating strip gap check satis.J rail & guide rails n of FOD.Push/Pull 8kg ok. Repeat checks on #1631-B2 door and also found DLS plunger slighly out of criteria,adjusted ok.And also done all the same test as the above mentioned. Done by Arthur Sam. 03/01/22