As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLIGHT 2309: NR 2 FUEL HEATER TEMP ERRATIC AT FIRST AND THEN WENT TO DASHED LINES. MAINTENANCE REMOVED AND REPLACED NR 2 ENGINE FUEL TEMP CANNON PLUG P67 IAW Q400 WD 46-10-00, SHEET 6 OF 7, PG 1. REMOVED AND REPLACED NR 2 FUEL TEMP BULB IAW Q400 AMM 73-31-09-000-801/-400-801. GROUND RAN NR 2 ENGINE. OPS CHECK OF FUEL TEMP GOOD. LEAK CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.