As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF AND CRUISE LVL 1 INTERMITTENT FIRE DETECTOR ENGINE 2 FAIL WITH ENGINE 2 FIRE WARNING. T/S PER FIM 26-11-01 PERFORMED WIRING CHECK LOOP "A" PIN J AND K FOUND SHORTED TO GROUND. CLEAN CONTAMINATION PERFORMED RTS PER AMM 26-11-02 ALL TEST PASS.