Stepping out TC reported rear partitiondoor was unable to be closed on the 'B' side. SM(BBT) checke d and confirmed 'B' side was opened and unable to latch clos e. SM(CCK) assisted - no avail. Staff(CCK, WDL, SBW and KTB) ~~~~~ Check both side 531/532 partition door ok. #3532 door slightly hard, service the door latch. Positive locking both side door and push test ok.    Done by Rosli/Anuar/Din. 09/06/20.