As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING AT IDLE POWER, NR 1 FUEL FILTER BYPASS LIGHT ILLUMINATED AND WENT OUT AFTER ABOUT A MINUTE. ACFT GROUNDED. NR 1 ENG FUEL FILTER REMOVED AND REPLACED, LEAK CHECKED GOOD IAW AMM 73-11-02-400-801. REMOVED FILTER CONDITON CLEAN & NO CONTAMINATION. NR 1 ENG FUEL FILTER DIFFERENTIAL SWITCH REMOVED AND REPLACED IAW AMM 73-34-01-400-801. GROUND VERIFICATION GOOD.