Corrective maintenance is reactive in nature. Every time a product or system fails, repair or restoration must follow to restore its operability. The following steps constitute corrective maintenance:

• Once the failure has been detected, it must be confirmed. If the failure is not confirmed, the item generally is returned to service. This no-fault-found problem leads to a considerable waste of time at significant cost. It also entails carrying an unnecessarily large inventory all the time.
• If the failure is confirmed, the item is prepared for maintenance and the failure report is completed.
• Localization and isolation of a failed part in the assembly is the natural next step in corrective maintenance.
• The failed part is removed for disposal or repair. If disposed of, a new part is installed in its place. Examples of repairable parts and connections include broken connections, an open circuit board on a PCB, or a poor solder.
• The item may be reassembled, realigned, and adjusted after repair. It is checked before being put back to use.