TC reported front DT car A2 door did notopen at platform. Staff(LKS) confirmed fault. Staff(LKS) is olated the faulty door at CNG1. ~~~~~ #3630 A2 door (left side) found door roller faulty. C/O door roller done. Conduct door cycling test 10/20mm for multiple times ok. Confriem no FOD found. Security checked done ok.  Low.CF / Ariff / Jaya / Fahmi.Y / Farhan / Sridhar 13.09.2023