As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE FIRE INDICATION, FL330 2135Z, NACELLE TEMP INDICATIONS ON "B" LOOP OVER 5.0. "B" LOOP WAS DEFERRRED. FHB SECTION 3 PROCEDURES ACCOMPLISHED. FOUND OVERPRESSURE RELIEF VALVE LEAKING EXCESSIVELY AT 40-PSI. REPLACED VALVE PER AMM 36-11-00 ADJ TEST. ACCOMPLISHED PNEUMATIC LEAK TEST NR 1 AND FOUND OK.