What should be monitored if the fuel quantity indicator shows a red light in the T-6?

When the fuel quantity indicator shows a red light in the T-6, it is an indication that the fuel quantity is critically low, and immediate attention is required. Monitoring the fuel gauge reading is essential in this scenario, as it provides direct information on the amount of fuel remaining in the tanks.

The red light signifies that the fuel level has dropped to a point that could jeopardize the safe operation of the aircraft. Understanding the precise fuel quantity is crucial to determine if there is enough fuel for continued flight or if a landing should be prepared for. This oversight helps in ensuring that the pilot can make informed decisions regarding the flight's continuation or any necessary emergency procedures.

While monitoring engine RPM, fuel flow rate, and fuel temperature can be important for overall engine performance and operational efficiency, they do not address the immediate concern of fuel quantity that the red light indicates. Focusing on the fuel gauge reading allows for a more direct response to the low fuel situation, ensuring pilot awareness and safety.