TC feedback that Rear M1 'B1' door obstacle detector on TIMS. Staff(KRJ) checked and confirmed Rear M1 'B1' unable to open. Staff(CCK) isolated door in closed p osition. TC feedback that Rear M1 'B1' door obstacle detecto ~~~~~ TC feedback that Rear M1 'B1' door obsta     Replaced door roller on #1610-B1(LHS),#2610-A1 (LHS) & #1609-B2 (LHS) due to wear and tear.Security check and all cyclic tested all within criteria and static test all ok. Done by Saini/Haslan/Asruddin.  05/12/22