As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 FUEL FILTER BYPASS LIGHT ILLUMINATED INFLIGHT. PER FIM TASK 73-05-00-810. REMOVED NR 1 ENG FUEL FILTER. NO CONTAMINATION FOUND. REPLACED FILTER PER AMM 73-11-02-400-801. ALSO REMOVED AND REPLACED NR 1 ENG FUEL FILTER DIFF PRESSURE SWITCH AMM 73-34-01. LEAK & OPS CHECK GOOD. A/C OK TO CONTINUE. PERFORMED EEC TEST NO FAULTS NOTED. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1469558 S/N OFF 04553 SWITCH, ENGINE OFF 29-7334-9-9001 4553 ON 29-7334-9-9001 2917.