As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR1 OIL TEMP FLUX 30-50-DEGREE C. AND NR1 FUEL TEMP AT 10 DEGREE C. RAN ACFT, NR 1 OIL TEMP FLUXED CONTINUOUSLY. NR 1 FUEL TEMP READ 10 DEGREES LOWER THAN NR 2. NO FLUX NOTED. REPLACED FUEL INDICATOR,FUEL TEMP READ CONSISTANT ON BOTH ENGINES. CHECKED WIRING ON NR1 ENGINE. NO DEFECTS NOTED. SWAPPED GAUGES, NO FIX. SWAPPED BACK. REPLACED TEMP BULB, NO OIL TEMP FLUX. REF. MM 79-00-02.