After starting both engines, what do the fuel switchlights indicate?

After starting both engines, what do the fuel switchlights indicate?

• A. The lights extinguish because the pumps enter standby mode
• B. The lights turn green
• C. The lights remain on
• D. The lights flicker

Answer: (A)

Fuel switchlights are status indicators for the electric boost pumps. When you start both engines, the system automatically places these electric pumps into standby because the engine-driven pumps are now supplying fuel. With the pumps in standby, the lights extinguish, signaling that the electric pumps are no longer actively pumping but are ready to take over if needed. This is normal and helps reduce electrical load while ensuring fuel pressure is maintained by the engine-driven pumps. If the lights were green, stayed on, or flickered, that would indicate abnormal or different conditions, not the standard engine-start sequence.

Fuel switchlights are status indicators for the electric boost pumps. When you start both engines, the system automatically places these electric pumps into standby because the engine-driven pumps are now supplying fuel. With the pumps in standby, the lights extinguish, signaling that the electric pumps are no longer actively pumping but are ready to take over if needed. This is normal and helps reduce electrical load while ensuring fuel pressure is maintained by the engine-driven pumps. If the lights were green, stayed on, or flickered, that would indicate abnormal or different conditions, not the standard engine-start sequence.