Which level of maintenance involves on-system maintenance, repair and return to the user, including maintenance actions performed by operators?

The answer is field maintenance by the army maintenance system which is also known as on system repairs, looking after and returns equipment to the operator or the user. Field maintenance also contains alterations, placements, facilities, relating accepted field-level modification work orders (MWOs), faults and failure analyzes, battle impairment assessment, overhaul, and retrieval.