The Components reliability is obtained by calculating, for each selected P/N :
- the MTBR (Mean Time Between Removal)
- the MTBUR (Mean Time Between Unscheduled Removal)
- the MTBF (Mean Time Between Failure)
To calculate the component's reliability:
- Define the protocol (Maintenance Programme)
- Click on the "Calculate" button
or
- Enter a specific P/N
- Click on the "Calculate" button
Note: you can also define (optional) a period (since - up to) and include the MR currently canceled or replaced (only active MR unchecked)
Each reliability information (MTBR / MTBUR / MTBF) and sample size (number of removal/installation TAGs)
The component's reliability report can be previewed/printed using the "Report" button
What's next:
Once the main figures are calculated, the highlighted items should be analyzed closely to evaluate if the maintenance programme needs to be modified. This analysis should be exposed in your approved procedures.
When analyzing a component's reliability, the following criteria should be taken into consideration:
- The number of removal / installation TAGs should be significant to obtain consistent data
- Exceptional cases, like the integration of a second hand aircraft, should be excluded from the analysis or remains negligible compared to the sample
- The component's importance (essential code), in term of safety (as determined by the manufacturer) and in term of dispatch (Go / Nogo / Go if)
- The component's reliability published by the manufacturer
- A representative sample of shop findings reports should be analyzed to determine the origin of the problem (recurring defect, no fault found, etc)
- Except otherwise approved by the Authority, a maintenance requirement should not be escalated beyond the manufacturer's recommendations (as set forth in the approved maintenance planning documents or equivalent)
- Once the list of "suspected unreliable components" is