When the Pt2 probes are blocked, what could happen during takeoff?

When the Pt2 probes are blocked, the impact on the engine performance during takeoff can lead to artificially high Engine Pressure Ratio (EPR) readings. The Pt2 probes measure total pressure and provide crucial data for calculating EPR, which is a key parameter used for monitoring engine performance and settings.

If these probes are blocked, the readings they provide may not accurately reflect the actual conditions of the engine. As a result, the indicated pressure may suggest higher thrust settings than are genuinely being produced by the engine, which can mislead the flight engineer or pilots into thinking the engines are performing better than they truly are.

This misrepresentation can lead to improper engine management and potentially critical situations, particularly during the demanding phase of takeoff, where optimal performance is essential. In contrast, the other options do not accurately describe the direct consequence of blocked Pt2 probes during takeoff. For instance, an increase in thrust settings or automatic throttle back situations wouldn't specifically stem from probe blockage.