What happens when the OIL PX (red) light stays on for pressure greater than idle?

When the OIL PX (red) light remains illuminated during pressure conditions that exceed idle, it is indicating that the oil pressure in the system is at a level of 40 psi or lower. This light serves as a crucial warning for pilots and operators, signaling a potential issue with the engine lubrication system.

If the oil pressure is too low, it can lead to inadequate lubrication of the engine components, which may cause serious damage if not addressed promptly. The illumination of this warning light usually prompts a check of the engine's oil pressure indicators and potentially an emergency procedure to mitigate any risk to the aircraft's operation.

In this context, the other options do not accurately describe the implication of the OIL PX light being on. For instance, it does not indicate normal operation since a constant illuminated light in this case points to abnormal pressure levels, highlighting a need for immediate attention and potential troubleshooting.