As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NUMBER 2 ENGINE FIRE TEST DOES NOT TEST NORMAL WITH BOTH LOOPS SELECTED. DOES TEST NORMAL WITH ONLY THE A LOOP SELECTED. ACFT GROUNDED. PERFORMED AN ENGINE FIRE DETECTION IAW FIM 26-10 TASK 801, INDICATED THE NR 2 ENG LOOP B FAULTED. CYCLED THE NR 2 ENGINE FIRE HANDLE AND NR 2 ENGINE FIRE LOOP GROUND. TESTED GOOD. CONTROL MODULE BITE SHOWS NO FAULTS. NO HISTORY PREVIOUS 30 DAYS.