When we consider the total contents of the aircraft work package we have a distinct number of elements:
a) Routine - these are the tasks which 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 activates which can potentially be quite disruptive and as a consequence deserves due consideration in respect of the various planning considerations to support an effective delivery of maintenance c) Deferred Maintenance - Tasks which are carried over from Line Maintenance deferred defects or defects deferred in accordance with the MEL d) Defects found during the maintenance check inspection activities - These defects are discovered during maintenance inspection of the various aircraft zones