As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING, NR 1 ENGINE FUEL FILTER BYPASS LIGHT ILLUMINATED AND STAYED ON UNTIL SHUTDOWN. GROUNDED - YES. REMOVED AND REPLACED THE NR 1 ENGINE FUEL DIFF PRESSURE SWITCH IAW AMM 73-34-01. OPS AND LEAK CHECKED NORMAL. NO FUEL FILTER BYPASS LIGHT ILLUMINATES DURING ENGINE RUN. GROUND VERIFICATION CHECK NORMAL. REF AMM 71-00-00. RECHECK NR 1 ENGINE FAULTS SHOW NO FAULTS ON LEG 0.