- The maintenance system shall be composed of the following functions:
- system management function;
- maintenance development function;
- fleet-maintenance management function;
- maintenance delivery function.
The system management function is to supervise and coordinate the implementation of all functions of the maintenance system. This function may not be delegated by the entity in charge of maintenance to other contractors.
The maintenance development function shall include activities that ensure the management of maintenance documentation, including the configuration management, based on design and operational data as well as on performance and return on experience. This function, or part of it, may be entrusted to other contractors.
The fleet-maintenance management function includes actions to ensure that the vehicle is taken out of service for maintenance and it is returned to operation after maintenance. This function, or part of it, may be entrusted to other contractors.
The maintenance function includes activities that ensure the required technical maintenance of the vehicle or its parts, including the issuance of documentation related to the release to service documentation. This function, or part of it, may be entrusted to other contractors.