49: Scheduling/Frequency Issue
Definition/Typical Issues
Was the fault-finding maintenance scheduled to be performed at an incorrect interval? Was the maintenance scheduled to be performed too frequently? Was it not scheduled to be performed often enough?
Note 1: Fault-finding maintenance and inspection are usually applicable to standby systems or the detection of hidden failures in systems.
Note 2: This node addresses how often the maintenance should be performed. If scheduled tests are not actually being performed, this is addressed by the Implementation Issue (#50) node.
Examples
Example 1
- A standby diesel generator was scheduled to be tested twice per month. The diesel engine was worn out by the testing.
Example 2
- No testing was being performed for an emergency cooler. As a result, the cooler failed to start when the primary cooler failed.
Typical Recommendations
- Ensure that standby systems are scheduled to be tested periodically to determine their operability.
- Ensure that the frequency of specified testing is correct (not too often, but often enough).
- Assess the impact of fault-finding maintenance on the system and adjust the frequency accordingly.
- Based on the results of tests and inspection activities, make appropriate adjustments to the inspection or test interval.
Cross-References
| Version 10 Element(s) | |
|---|---|
| Node ID | Node Name |
| 47 | Frequency LTA |
| Maritime Element(s) | |
|---|---|
| Node ID | Node Name |
| 60 | Scheduling Issue |