Which of the following is an example of unplanned maintenance?

Unplanned maintenance refers to maintenance activities that are not scheduled in advance and often occur unexpectedly due to equipment failure or malfunction. This type of maintenance is essential to address critical breakdowns that can hinder operations or pose safety risks.

The example of emergency repairs due to equipment failure fits this definition perfectly, as it highlights a situation where maintenance is required suddenly and without prior planning due to an unforeseen issue. This contrasts notably with planned maintenance activities—such as preventive checks, routine inspections, and scheduled routine replacements—which are all organized and intended to maintain equipment proactively before issues develop. Recognizing the difference between planned and unplanned maintenance is crucial in ensuring effective maintenance management and minimizing downtime in operations.