MROs seek to reduce costs by developing repair solutions from scratch. In engine component maintenance. In engine component maintenance, repair-rather than replacement-is usually the less costly option. But when the OEM maintenance manual does not contain a repair solution, an MRO may be tasked to develop one.
Collected and summarized from the source below by Quynh Hoa https://www.mro-network.com/engines-engine-systems/engine-mros-see-opportunity-component-repair-development