TC reported smoke external at FM1 car, Rear train T143 line clear and confirmed no abnormalities. SM(JKN) checked and confirmed no sign of smoke ~~~~~ #1551/2551 SMOKE EXTER L TRIGGER.REPLACED 1551/2551 SMOKE DETECTOR UNIT.FUNCTION TEST CHECKED OK.NORMALISE EXTER L SMOKE CURRENT BREAKER. HAIRUL/AKHBAR 02.03.2023 #1551 SMOKE DETECTOR UNIT S/N NEW KSFD-18, OLD -NIL .NOTIFICATION 2466417 #2551 SMOKE DETECTOR UNIT S/N NEW SD-015, OLD -NIL .NOTIFICATION 2466419