As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AIRCRAFT RETURNED TO DFW DUE TO A #1 ENGINE FUEL FILTER CLOG MESSAGE. NO EMERGENCY WAS DECLARED AND THE AIRCRAFT LANDED SAFELY WITHOUT FURTHER INCIDENT. REPLACED #1 ENGINE FUEL FILTER (AALA202104139006) PER TASK CARD 26C40073001 AND FUEL FILTER DIFFERENTIAL PRESSURE SWITCH (AALA202104139007) PER AMM 73-34-15-400-041-A. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLSIHED.