Final answer:
When a GEN 2 OFF caution message appears, it indicates a problem with the second generator in an aircraft's electrical system. The pilot should consult the aircraft's manual and follow the prescribed procedures, which might include resetting the generator or switching to an alternate power source.
Step-by-step explanation:
The GEN 2 OFF caution message likely refers to an indication that the second generator in a dual-generator electrical system (typically found on an aircraft) is offline or not producing power. The appropriate action would involve following the specific aircraft's emergency or abnormal procedures, which generally includes attempting to reset the generator or switching to the alternate source of power if the reset fails. It is important to consult the aircraft's operating manual or checklist for the exact procedure, as these steps can vary depending on the type of aircraft and the nature of the systems involved.