Aircraft Reliability Analysis
We looked at some of the considerations in the last post regarding sources for reliability monitoring.
Another important factor is what do you consider for further investigation and at what levels do you investigate metrics.
First, we need to consider something called “engineering judgement” which is a term used to describe the ability of a qualified and aware individual or team and allows any individual item to be considered for investigation regardless of metrics associated with it; this is an important awareness and offers real value in regard of experience being used to aid a fleet.
In addition to the engineering judgement, we may wish to put in place certain criteria that ensures items are investigated which is driven by the metrics associated with reports.
Reporting into any system is the key to its success and the more accurate the report the more we can achieve.
We can consider the below points as an example, where if any of the criteria is met then the report(s) are investigated:
1. We can consider if we have alert levels set up, this is when we review how many reports vs criteria such as FH (Flight Hours) we deem to require needing investigation – Consider the following examples:
Defect Analysis for Alert Level
Define the Alert level calculation: Mean of defect rate per 1000 FH over a rolling period of time (3 months for illustration) for a maximum of X months (X might be 9 months for illustration).
Component Analysis for Alert Level
Define the Alert level calculation: Mean of unscheduled removal rate per 1000 FH over a rolling period of time (3 months for illustration) for a maximum of X months (X might be 18 months for illustration).
Awareness is required when using alert levels however as for a small fleet these can cause issues.
2. Is the item critical safety related – Such as fumes in Cabin or Escape Slide Failure / accidental deployment / technical issue)
3. Is a specific defect causing ATA rise.
4. Has any defect been present for over a noted period or occurred multiple times in a given period.
5. Is an ATA defect rate rising for a defined time period.
Let us know your thoughts or additional points you might consider.
Follow us to learn more or why not learn more about reliability on our Aircraft Reliability Training Course https://ialta.aero/aviation-courses/aircraft-reliability-training-course
#ialta #aircraftmanagement #aircraftleasing #aircraftengineer #aircraftparts #aircraftengines #aircraftmechanic #onlinelearning #aircraftsales #reliability #trendmonitoring #camo #trendmonitoring