TIMS showed fire external at FM1 car. Staff (RDH) checked no heat, smoke and abnormalities. Rear Tra in 117 checked no sign of heat or smoke. ~~~~~ FOUND SMOKE DETECTOR WITH WATER INGRESS.REPLACED EXTER L SMOKE DETECTOR WITH AVAILABLE SPARE.SECURITY/FUNCTION CHECK OK .ETHAN/RAM 26.07.2022 S/N OLD A-42-196     NEW SD-006