What alert will an amber light on the annunciator panel in each cockpit indicate?

The amber light on the annunciator panel in each cockpit indicates a cautionary condition that requires the pilot's attention but is not immediately critical. Specifically, an open bus tie switch alerts the pilot that the electrical bus systems are not interconnected as they typically should be, which could affect the power distribution to various aircraft systems. This situation is important to address to ensure that all systems receive the necessary power for safe operation, but it does not imply an immediate emergency, unlike issues such as engine failure or high temperature warnings, which would typically trigger a more urgent response indicated by other colored lights. Recognizing this caution allows pilots to be aware of potential issues while managing the overall safety and functionality of the aircraft's systems.