If oil pressure remains between 15 and 40 psi at IDLE power for over 5 seconds, which annunciators will illuminate?

When oil pressure is observed to remain between 15 and 40 psi at idle power for over five seconds, it indicates a situation that could lead to potential engine issues. The warning systems in the T-6 aircraft operate to alert the pilot of various operational parameters that are outside of the normal range.

In this scenario, both the amber and red OIL PX annunciators will illuminate to convey the respective statuses of the oil pressure. The amber OIL PX light serves as a cautionary alert indicating that oil pressure has fallen below normal operating conditions, while the red OIL PX light represents a more serious alert, indicating a potentially critical issue if the oil pressure does not return to a safe range.

This two-tiered warning system is designed to ensure that the pilot is fully aware of the oil pressure situation, promoting prompt action to address the issue before it results in engine damage or failure. Therefore, the illumination of both the amber and red OIL PX lights highlights the severity of the condition and the importance of maintaining the appropriate oil pressure for safe aircraft operation.