Pax feedback to Staff (YIS)loud noisecoming from the top ceiling in the train at car 1654 and 265 4. Staff (SBW) checked and confirmed no abnormalities. ~~~~~ 1654 and 2654 Pax feedback to Staff (YIS) loud noise coming from the ceiling. Staff (SBW) confirmed no abnormalities.  1654 and 2654 checked all L  & evaporator - OK. Checked gangway for abnormalities - OK. 1654 found A/C 1-2 motor shorted to G and APS tripped & damper activated. Notification 2465873 raised for condenser C/O. Fazly/Farid/Aiman 44984