42: Condition-based Maintenance Issue
Definition/Typical Issues
Did the condition monitoring activity fail to detect a failing component? Was there a failure to perform the monitoring activity? Was the correct parameter being monitored to detect failure? Was the predictive maintenance incorrectly performed?
Note 1: The Scope Issue (#43) node addresses the scope of the condition-based maintenance process. Detection Method Issue (#44) node addresses what is supposed to be monitored. The Monitoring Issue (#45) node addresses performing the monitoring task. The Data Interpretation Issue (#46) node addresses the interpretation of the data that is collected from the field.
Note 2: Once the condition-based maintenance activity has detected a problem that needs to be resolved, the issue then proceeds to the Corrective Maintenance Issue (#51) cause type. This cause type addresses the subsequent Troubleshooting/Corrective Action Issue (#52) and Repair Implementation Issue (#53).
Examples
Example 1
- A number of pump bearings have failed recently. Condition-based maintenance was selected as the appropriate type of maintenance for the pump bearings. However, monitoring of the pump bearings was never performed even though it was identified as a requirement in the equipment reliability program.
Example 2
- Turbine bearing temperatures were being monitored to predict impending failures. However, failures occurred even though there was no prediction of failure based on temperature levels. Vibration should have been monitored instead because it was a better predictor of impending failures.
Typical Recommendations
- Provide guidance on the typical parameters that can be monitored to predict failures for different types of components.
- Ensure that monitoring equipment used for condition-based maintenance is appropriate for the component.
- Ensure that equipment monitoring is being performed.
- Ensure that the scope of equipment condition monitoring is adequate.
Cross-References
| Version 10 Element(s) | |
|---|---|
| Node ID | Node Name |
| 36 | Predictive Maintenance LTA |
| Maritime Element(s) | |
|---|---|
| Node ID | Node Name |
| 45 | Condition Monitoring Maintenance Issue |