During inspections, what is a common sign of internal component failures?

The presence of both engine overheating and abnormal noise levels during inspections can be indicative of internal component failures, making C the correct response.

Engine overheating often suggests issues such as inadequate cooling, potential oil leaks, or failing bearings. These conditions can arise from internal components malfunctioning, leading to increased operational temperatures that signify a problem.

Abnormal noise levels, on the other hand, can indicate wear or damage to critical internal components. For example, unusual sounds might signal issues such as a failing turbine, loose parts, or imbalanced rotating components. These noises should be taken seriously, as they often precede more severe failures.

Both overheating and noise are not isolated indicators but can work together to point to more serious issues within the engine. By recognizing these symptoms, mechanics can diagnose and address underlying problems before they lead to catastrophic failures, ensuring safety and reliability in engine operation.