As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: FILTER BYPASS LIGHT FOR FUEL ON ENGINE NUMBER 2 CAME ON FOR ACOUPLE MINUTES, THEN EXTINGUISHED WHEN CENTER PUMPS TURNED ON. CENTER PUMPS WERE OFF FOR TAKEOFF DUE TO LOW QUANTITY 1000 LBS. LIGHT REMAINED OFF AFTER CENTER PUMPS TURNED BACK OFF WHEN TANK EMPTY. REMOVE AND REPLACED FUEL FILTER DIFFERENTIAL PRESSURE SWITCH. PER AMM 73-34-01. LEAK CHECK CARRIED OUT NO LEAK DETECTED. FILTER BYPASS LIGHT DID NOT ILLUMINATE.