During PM check #3542 FAD no.1 always cl ~~~~~ During PM check #3542 FAD no.1 always cl    #3542 Found B side no 1 end FAD normal mode in closed position.Emergency vent still in closed position,no 1 end A side was open.Swap Bside & A side confirm tested faulty.Replace A side FAD and function test ok. #3542-FAD:- Old: 01110100 New: 01120188 Not: 2486736 raise to CSC Done by Asruddin/Zulq. 09/05/23