What type of checks are typically performed during engine inspections?

Visual zonal inspections are crucial during engine inspections as they involve systematically examining specific areas of the engine for signs of wear, damage, or potential issues. This type of inspection helps ensure that all components are in good working condition and that any anomalies can be identified early on. Visual inspections focus on areas that may not be easily accessible during routine maintenance, allowing for the detection of leaks, cracks, or other surface-level problems that could lead to more significant engine issues if left unaddressed. By conducting these inspections, maintenance teams can maintain the integrity and reliability of the engine, ensuring safety and performance in aviation operations.

The other options, while related to aircraft maintenance, do not directly focus on the core aspects of engine inspections. For instance, detailed inspections of the airframe primarily concentrate on the structural components and overall integrity of the aircraft's body. Weight and balance checks involve ensuring that the aircraft's center of gravity is within safe limits, which is critical but not specific to engine performance. Fuel system checks, while important for engine operation, are generally part of a different inspection category focussing on fuel delivery rather than the engine itself.