As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED. DURING CLIMB AT HIGH THRUST SETTING, FUEL FLOW 77,000 LBS, THE LEFT ENGINE FUEL FILTER BYPASS LIGHT ILLUMINATED. LIGHT WENT OUT WITH FUEL FLOW LESS THAN 5000 LBS. REMOVED AND REPLACED LEFT ENGINE FUEL FILTER IAW SIC 4907. LEAK AND OPERATIONAL CHECK GOOD.