FUEL 1 LOW and FUEL 2 LOW warnings appear when fuel remains approximately how many pounds?

• A. Approximately 100 lbs
• B. Approximately 172 lbs
• C. Approximately 50 lbs
• D. Approximately 200 lbs

Answer: (B)

Each main fuel cell has its own low fuel warning, so you get an alert for the specific tank that’s running low. The FUEL 1 LOW and FUEL 2 LOW warnings come on when the fuel in that respective tank is about 172 pounds. This gives you a timely signal to take action—switch fuel sources if possible, plan for a landing with reduced reserves, or reconfigure as needed—before fuel becomes critical. In practical terms, 172 pounds is roughly 25 gallons, a conservative margin that helps maintain safe operation and proper balance. Since the warning is tank-specific, you know exactly which side is low, which is important for managing weight and balance during flight.