TC reported rear cab entry indication illumindated. Staff (KTB) checked and feedbacked both doors we re closed. Staff confirmed no unauthorized person, no suspic ious item and all switches (sealed and unsealed) in normal c ~~~~~ TC reported rear cab entry indication il L3   Further check found A4 door both side door roller have defect(deep cut on rubber roller)Replaced both rubber roller and function door cycling x50 tested ok. Done by Sanip/Faddzal/Koh. 21/07/20