Pax feedback to staff (YCK) rear M1 car'B4' train door close with cranking sound.Staff(YIS) chec ked and feedback no abnormalities. ~~~~~ 3634 Pax feedback to staff (YCK) rear M1 car(1633) 'B4' train door close with cranking sound.  Staff(YIS) checked and feedback no abnormalities. CE:T406-1633 B4 Door Operations Open/Close  OK.  NO FC. Check 1633 B4 door was smooth. Door cyclic test 20x ok. No abnormal sound from 1633 B4 door. All door no abnormality and wobbling. Static test timing ok. No FOD nor scratch marks Done Luke 10072023