TC reported Train door Front DT A2 unable to close. Recycle three times, fault persist. SM(CCK) manu al close the train door inside the train. SM(CCK) following the train to monitor. ~~~~~ #3628-A2 door was removed for performing J-rail and bottom guide rail checked ok. Door roller check and clean ok. Guide rail gap - 18.3mm and individual door check ok. Door resistance check before (8.2kg) after service (7.2kg). Door leaf check - top >64mm, middle >64mm, bottom >64mm-ok. Door cycle test for 100 times, no fault found. L3 door faulty already report to Ting Wei & Rahul. Checked by Jack/Sateesh/Koh. 31/05/20.