During an inspection, what must be done if an abnormal noise is detected in the engine?

When an abnormal noise is detected in the engine during an inspection, it is crucial to conduct further investigation to diagnose and resolve the issue. This approach is vital for several reasons. Abnormal noises can be indicative of potential mechanical failures, misalignments, or other issues within the engine that could lead to serious problems if left unaddressed.

By investigating the source of the noise, maintenance personnel can identify the specific cause, determine the severity of the problem, and take appropriate corrective action before it escalates into a more significant and potentially hazardous situation. This investigative step is aligned with best practices in aircraft maintenance and safety protocols, ensuring that all potential safety risks are thoroughly evaluated and mitigated.

Promptly addressing abnormal noises contributes to the overall reliability of the engine and helps maintain operational safety standards. Ignoring the noise or simply documenting it without further inspection does not address the potentially serious implications for engine performance and safety. Similarly, while changing the engine oil may be beneficial as part of routine maintenance, it does not directly resolve the issue indicated by an abnormal noise.