As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 FUEL BYPASS LIGHT ILLUMINATED IN FLIGHT. CONSULTED MX CONTROL & QRH & RETURNED TO GUM. REMOVED, INSP'D & REPLACED FUEL FILTER PER AMM 73-11-02. NO OBSTRUCTIONS NOTED. REPLACED FUEL FILTER DIFF PRESS SWITCH PER AMM 73-34-01. OPS CHECK NORMAL. NO LEAKS NOTED. OK FOR SERVICE. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1447639 S/N OFF 04986 SWITCH, ENGINE OFF 29-7334-9-9001 4986, ON 29-7334-9-9001 8176.