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A
Continue working — it's probably nothing
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B
Immediately inform your supervisor and the maintenance team about the unusual noise — document when you first noticed it and what it sounds like
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C
Try to diagnose and fix it yourself
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D
Wait to see if the noise gets worse before saying anything
Why this is the answer
Unusual equipment sounds are early warning signs of developing problems. Reporting immediately allows maintenance to inspect before a failure occurs — preventing equipment damage, production disruption, and potential safety hazards. The documentation (when noticed, description of sound) helps maintenance diagnose the issue. Never attempt self-repair on industrial equipment without authorization and proper training.
Source: USPS 475 VEA, Equipment Safety Reporting