As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INTERMITTENT NR 2 ENGINE FIRE LOOP B FAULTED. REMOVED AND REPLACED FDU 2 IAW AMM 26-12-34, CONDITION SAME, ORIGINAL FDU REINSTALLED. FOUND PYLON DETECTOR 7WD2 READING 9.9 OHMS PIN C TO A OUT OF LIMITS AND SHORTED TO GROUND FROM STUD. REPLACED THE PYLON FIRE DETECTOR 7WD2 IAW AMM TASK 26-12-16-400-808-A. OPS CHECKED OK, NO FAULTS NOTED.