As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INTERMITTENT LVL 1 FIRE DET 2 FAULT ALERT DURING CLIMB AND CRUISE. DISCONNECTED #2 ENGINE FDCU AND ALL 6 FIRE DETECTORS. CHECKED WIRING FOR SHORTS TO GND AND OTHER CONDUCTORS, NONE FOUND. AT PYLON DETECTOR FOUND ONE RING TERMINAL LOOSE ON WIRE. RETERMINATED PER SWPM 20-00-16. RECONNECTED UNITS. TESTS GOOD PER MM 26-11-02.