A replacement repeats the same failure
A fictional production line has received two replacement bearings in a short period. The maintenance record names the failed part but contains no alignment result, lubrication specification, contamination observation or relevant load history. A colleague proposes buying the identical bearing again because the replacement briefly restored movement. Another separates the immediate failed component from the still-unestablished cause and plans an authorized investigation using the equipment documentation and comparable evidence. No machine is opened or operated in this written exercise. The learner must explain why a short-lived restoration is not proof of root-cause removal, identify useful missing records and preserve appropriate isolation and restoration responsibilities rather than invent a universal repair.
1. What remains unestablished?
Read the worked answer
The mechanism causing repeated failure remains unestablished. Naming the bearing or observing brief restored motion does not identify the underlying load, lubrication, alignment or contamination problem.
2. What should the review examine?
Read the worked answer
Review appropriate actual operating conditions, installation and condition evidence, equipment instructions and prior work. Use authorized safe procedures, document findings and verify the chosen correction before controlled restoration.