What might indicate possible turbine damage in an engine?

The indication of possible turbine damage is best reflected by high exhaust gas temperature (EGT), high fuel flow, and low RPM. High EGT can suggest that the turbine is experiencing excessive heat, which can be caused by a malfunction in the combustion process or inadequate cooling. High fuel flow indicates that the engine is consuming more fuel than usual, potentially to compensate for inefficiencies or malfunctions in the combustion chamber or turbine section. Meanwhile, low RPM suggests that the engine is not operating at its designed power output, which can further support the idea that there is an underlying issue affecting turbine performance.

When a turbine is damaged, it may struggle to maintain proper rotation speed due to stress and mechanical failure, which can lead to a decrease in efficiency and an increase in temperatures due to improper exhaust flow. The combination of these factors—high EGT, high fuel flow, and low RPM—creates a scenario that points toward turbine damage, making this the correct answer for indicating potential problems within the engine's turbine system.