What was the likely error in the Boeing 767 fuel example?

• A. The Left Wing Pump Failed
• B. The Overhead Panel Was Updated Correctly
• C. The Center Fuel Pumps Were Probably Never Turned On During Preflight
• D. The Crew Cross-Checked Properly

Answer: (C)

Focus on how fuel is supplied and what preflight checks verify. On a Boeing 767, engines can draw fuel from multiple tanks, with center tanks having their own pumps to ensure a steady feed even if wing tanks are low or crossfeed is used. If those center-pump switches are not turned on during preflight, the center tanks won’t contribute fuel to the engine feed system. That means, later in flight, you could run into fuel-feed problems or be limited in crossfeed capability just because the center tanks were never energized and checked.

So the most plausible error is that the center fuel pumps were probably never turned on during preflight. This explains a fuel management issue tied directly to a procedural step in preparing the aircraft’s fuel system. The other possibilities describe true faults or procedures that wouldn’t logically lead to the described fuel issue: a single wing pump failure would be a gear-detectable fault, updating the overhead panel doesn’t affect fuel supply, and proper cross-checking would reduce, not cause, fuel-handling problems.