| event_id,sensor_id,event_type,start_time,end_time,description | |
| 1,3,sensor_drift,2024-04-01 00:00:00,2024-04-30 00:00:00,Sensor 3 drifted upward throughout month 4 after missed calibration | |
| 2,1,failure_spike,2024-05-21 03:00:00,2024-05-23 18:00:00,Sensor 1 vibration spiked during spindle bearing failure | |