What will illuminate if the right starter is accidentally turned on in flight?

In the scenario where the right starter is accidentally turned on during flight, the systems in place are designed to prevent any adverse condition that may occur from this action. Specifically, activating the right starter in-flight typically does not engage the starter circuitry in a way that would indicate a problem, leading to the absence of illuminated warning messages.

The integrated aircraft systems monitor the operation of the engines, and since the starter is not intended to be activated when the engines are already running, there would be no messages or alerts stemming from that action. Consequently, the absence of a warning or alert is in line with aircraft design principles that prioritize safety and ensure that unnecessary alerts do not distract the crew from their primary flight duties. Therefore, no messages will illuminate, confirming that the systems are functioning as intended and preventing confusion during critical phases of flight.