What is the first action to take if experiencing low volts at high RPM?

When experiencing low voltage indications at high RPM, the first action to take is to turn off the alternator. An alternator provides electrical power to the aircraft systems and charges the battery while the engine is running. However, if the voltage is low despite the engine running at high RPM, it could indicate a malfunction in the alternator or associated electrical systems. By turning off the alternator, you prevent further potential damage and drain on the electrical system, allowing you to assess the situation and conserve battery power for essential systems.

Turning on the altimeter, charging the battery, or checking fuel levels would not directly address the immediate issue of low voltage. In an aircraft, managing electrical power and ensuring the system is functioning correctly is critical for safe operation, making turning off the alternator the appropriate first step in this scenario.