Train doors at rear DT car 'A2' doorswere not proven closed. TC recycled train doors twice - ok. F ault did not recur at subsequent stations. ~~~~~ 3645 A2 Train doors were not proven closed. Level 3. TC recycled train doors twice - ok. Fault did not recur at subsequent stations. CE:3645 A2 door operation ok, no abnormality found, door proven closed L3 3645 A2 Checked door roller - OK, Checked FOD -OK. Checked voltage to motor - OK. Checked for loose connection - OK. Replaced DCP. Performed door push pull test-OK. Au TK 44566