What conditions will cause a high EGT, W sub 'F', and RPM with a normal EPR indication, at all power settings?

A high Exhaust Gas Temperature (EGT), fuel flow (W sub 'F'), and RPM, while maintaining a normal Engine Pressure Ratio (EPR) across all power settings, suggests that the engine is experiencing an issue that is not directly affecting its overall pressure ratio but is nonetheless impacting performance metrics like temperature, fuel flow, and rotational speed.

When the bleed valve is stuck in the open position, it can lead to a sustained loss of pressure in the engine, but since the EPR remains normal, this indicates that the engine is still able to maintain its designed pressure recovery. However, the inability to use bleed air effectively can result in hot, less-efficient air entering the combustion chamber. This inefficiency can increase EGT because the combustion process may not be as optimized under these conditions, leading to higher temperature outputs.

Combining all this information, a stuck bleed valve would cause the engine to exhibit high EGT and RPM alongside a normal EPR, as the bleed valve's open position disrupts the expected airflow and thermodynamic efficiency even while the overall pressure ratio remains unchanged.