On the ED2 and fuel synoptic pages, the main tank fuel quantity indications turn amber under which conditions?

• A. Either main tank is less than 600 lbs
• B. Total fuel is less than 1200 lbs
• C. Fuel imbalance exceeds 800 lbs
• D. Any of the above

Answer: (D)

Amber fuel indications on the ED2 and fuel synoptic pages warn you about fuel states that require attention to safety and airplane handling. The warning lights come on if any one of these conditions is true: a main tank drops below 600 pounds, the total fuel on board is under 1200 pounds, or the fuel imbalance between tanks exceeds 800 pounds. Each condition points to a different risk: a low amount in one tank reduces available reserves and can affect balance and CG; if total fuel is very low, overall reserves for go-arounds or diversions are tight; and a large imbalance creates asymmetric loading that can affect controllability and requires corrective action, like transferring fuel to restore balance. Because the amber indication appears for any of these scenarios, the system flags a warning whenever any one of them occurs, signaling the crew to address fuel management and balance promptly.