What action would help identify a gauge or wiring fault in a suspect fuel quantity indication?

• A. Cross-check with other indicators and validate against the fuel schedule
• B. Weather radar malfunction
• C. In-flight entertainment failure
• D. Flap actuation error

Answer: (A)

When a fuel quantity indication looks suspect, use data redundancy and the flight plan to verify it. Cross-check the primary gauge reading against other indicators such as standby fuel gauges and wing tank indicators, and compare with the fuel management/totalizer displays. Then validate against the planned fuel on board by calculating remaining fuel from burn rate and elapsed time. If the various readings align with each other and with the fuel schedule, the issue is likely a gauge or wiring fault rather than an actual change in fuel quantity. If they diverge, you may be looking at a broader system fault affecting the indication rather than the fuel itself. The other options don’t help diagnose gauge or wiring faults because they don’t provide data about fuel state or the indication system.