What pressure reading triggers the OIL PX (red) light at idle?

The trigger for the OIL PX (red) light at idle is set at a pressure reading of 15 psi or lower. This level of pressure indicates a potential issue with oil pressure that could lead to inadequate lubrication of the engine components, thereby posing a risk of damage or failure. Oil pressure is crucial for maintaining engine function as it ensures that all moving parts are properly lubricated and that friction is minimized.

At idle, the engine runs at a lower RPM, resulting in reduced oil circulation. If the pressure falls to 15 psi or below, it signifies that the oil pump may not be delivering sufficient oil pressure to critical engine areas. Therefore, the activation of the OIL PX (red) light serves as a vital warning to the operator to take immediate action to prevent possible engine damage caused by low oil pressure conditions. This safety feature is designed to alert pilots and operators in order to maintain the operational integrity of the engine.