When we consider the total contents of the aircraft work package, we have a distinct number of elements:

a) Routine—these are the tasks that are packaged into maintenance checks and assigned from the aircraft maintenance program
b) Service Bulletins, Mods, and AD-driven—this package forms a group of activities that can potentially be quite disruptive and, as a consequence, deserves due consideration in respect of the various planning considerations to support effective delivery of maintenance
c) Deferred Maintenance - Tasks which are carried over from Line Maintenance deferred defects or defects deferred by the MEL
d) Defects found during the maintenance check inspection activities - These defects are discovered during maintenance inspection of the various aircraft zones

Developing more effective Planning

In respect of a) we should be able to develop the best possible understanding, as there is a level of consistency that allows us to optimize the maintenance process driven by the data that is available (actual man hours versus estimated man hours, lost time, and post-check analysis feedback).

In respect of b) the incidence of AD implementation is quite small however, the need to implement Service Bulletins and Mods is far more prevalent and, without a doubt, can be very disruptive. The need to develop organisational processes that pay particular attention to the impact of Service Bulletins and Mods can significantly improve the economics of the maintenance process. Again, it is important to pay attention to and act on post-check analysis and feedback to drive improvements.

In respect of c) It is important to ensure that the supply chain is activated to minimize exposure to lack of spares, in addition to ensuring that the impact on the routine tasks is examined and understood, and finally to ensure that the manpower required to address the deferred maintenance has been factored into the downtime that is available.

In respect of d) we can, in a similar way to “a” determine the typical profile of defect findings based on the type of check and the age of the aircraft – using standard deviation techniques, we can determine the typical profile for defect finding to use as a baseline on which to build our understanding of issues that may have systemic implications that need to be investigated further. Again, information may be identified during the post-maintenance check meeting and subsequent analysis.

Sofema Аviation Services offers a range of Regulatory and Vocational training to comply with the requirements of EASA.

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