TC reported fire external at car 1557. Staff(TPG) checked no sign of fire. No abnormalities. Rear T3 42 line clear no abnormalities. TC reported fire external atFront M1 car. Staff(TPG) checked no sign of fire. No abnorm  ~~~~~ 1557 SMOKE DETECTOR OPERATION CHECK FAILED.C/O NEW SPARE.FUNCTION TEST OK.HAFIZ/ZOHRI/YUSRI/SURENDAR 17.10.2023