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The objective of study CAA Paper 2009/05: Aircraft Maintenance Incident Analysis was to analyse a selection of maintenance related events on jet aircraft above 5,700kg MTOW, captured and stored under the requirements of the CAA’s Mandatory Occurrence Reporting (MOR) scheme to identify trends, themes and common causes or factors.

This Paper comprises an updated version of CAA Paper 2007/04, extending the study period by one year to end 2006. Overall, the conclusions of the previous study are unchanged, except that an increasing trend in the total number of maintenance related MORs is now apparent.

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