As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - DURING CLIMB AND CRUISE NR 2 FUEL TEMP WILL NOT STAY BELOW 72 DEG C. E&A CHECKLIST DIRECTS TO TURN ON NR 2 AUX PUMP. TEMP STABILIZED AT 66 DEG C. TEMP AT CRUISE (15000FT) +4 DEG C. RETURNED TO THE FIELD (PDX), ACCOMPLISHED A UNEVENTFUL LANDING. REPLACED NR 2 FUEL HEATER THERMAL ACTUATOR PER AMM 73-11-05-000-801/400-801. OPS & LEAK CHECK GOOD. RETURNED TO SERVICE.