An on-condition maintenance concept is employed for RM12 engine. This means there are no fixed overhaul intervals. The condition of the engine determines when a maintenance activity should be carried out. The document governing all such activities is the Maintenance Plan. It's concept is built on a strict failure mode and effects analysis and an early detection system (MSG 3).
Prerequisites for an on-condition maintenance policy are the capability to detect failures, a modular design, and an engine condition monitoring system (ECMS).