(RSD) TC reported 1683 B4 door LFF noisy ~~~~~ (RSD) TC reported 1683 B4 door L  noisy     #1683-#6 N  noisy and replaced.Function test ok. Old s/n: 2766  New s/n: 2578 Not: 2146385 Raise to RSW for servicing. Done by Loong/Pravin. 01/04/20