What is corrective maintenance?

• A. Routine lubrication
• B. Scheduled inspections
• C. Upgrading to new model during modernization
• D. Replacement of worn components after failure

Answer: (D)

Corrective maintenance is work done to bring equipment back into service after a failure or breakdown. It is reactive, triggered by the actual failure, and aims to diagnose, repair, or replace the failed component so the system operates again. For example, if a bearing fails and the machine stops, the corrective maintenance would involve replacing the bearing and testing the system before it runs again. This stands in contrast to routine lubrication or scheduled inspections, which are preventive measures designed to prevent failures, and to modernization efforts that upgrade equipment rather than fix a failure.