If you see a circuit breaker that has tripped and shows a white rim, what should you do?

The appropriate action when encountering a tripped circuit breaker with a white rim is to advise the Pilot In Command (PIC) before proceeding. This is crucial because the PIC has the ultimate responsibility for the safety of the aircraft and all onboard. Notifying the PIC ensures that they can assess the situation and decide on the proper course of action based on their training and expertise. The tripping of a circuit breaker can indicate an underlying issue that may need to be addressed before resetting or taking any further steps. Effective communication helps maintain safety protocols and ensures that all actions taken are coordinated and in line with aviation standards.

Other options could potentially lead to safety risks. For instance, attempting to reset the breaker without informing the PIC might overlook critical issues that need attention, and resetting it oneself without proper authorization can create operational hazards. Simply pushing it back into place or leaving it alone disregards the appropriate chain of responsibility and could jeopardize safety. Thus, advising the PIC is the best and safest course of action in this scenario.