OTH80 号罐循环泵灾难性失效泄漏可燃液体近 30 分钟未被察觉（缺乏监测报警器提示泵失效），蒸气云点燃致持续 3 天大火；CSB 指出 ITC 缺乏报警操作员的监测器、缺乏可远程操作的紧急隔离阀
ITC 缺乏监测泵失效的报警器/气体检测系统，且无可远程操作的紧急隔离阀，导致泄漏未能及时探测与切断
The recorded code OTH is an ISO 14224:2016 functional failure code (describes what the equipment failed to do). The damage mechanism (how it failed) is shown in the Mapping block above. The two are distinct dimensions in ISO 14224.
sensor_drift_calibration信号丢失 sensor_signal_loss变送器电子故障 transmitter_electronic_fault阀门定位器故障 valve_positioner_fault终阀卡涩 final_element_sticking电磁阀线圈烧毁 solenoid_valve_coil_burn回路振荡 loop_oscillation电源故障 power_supply_failure通信中断（总线） communication_loss_bus误跳闸（SIS 误动） spurious_trip拒动（SIS 该动不动） fail_to_trip逻辑错误（SIS 组态） software_logic_error接地环路干扰 ground_loop_noise环境腐蚀端子 environmental_corrosion_terminal后备电源失效 battery_backup_failure网络安全失陷（配置篡改） cyber_security_compromise气体探测器零点漂移 gas_sensor_drift气体探头中毒 gas_sensor_poisoning火灾探测器误报 fire_detector_false_alarm火灾探测器漏报 fire_detector_fail_detect探测视角遮挡 detector_obscuration线路故障 fgd_wiring_fault探测器失电 fgd_loss_of_power标定漂移 calibration_drift环境腐蚀 environmental_contamination通信中断 fgd_communication_loss响应时间退化 response_time_degradation自检失败 self_test_failure