Division 4.5 Maintenance rules

The maintenance rules of the Subsystem covered by this TSI shall ensure that the values quoted in the basic parameters indicated in Chapter 4 are maintained within the required limits throughout the lifetime of the assemblies. However, during preventative or corrective maintenance, the subsystem may not be able to achieve the values quoted in the basic parameters; the maintenance rules shall ensure that safety is not prejudiced during these activities.

To achieve these results, the following shall be respected.