As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE B SYSTEM, FIRE DETECTION INOPERATIVE. ACFT GROUNDED. UNABLE TO DUPLICATE. ACCOMPLISHED ENG/APU FIRE DETECT CONTROL MODULE BITE NO FAULTS. ACCOMPLISHED RESISTANCE CHECK NR 2 ENG FIRE DETECT "B" LOOP IAW AMM TASK 26-11-00-730-801 AND TASK 26-11-01-211-801, NO DEFECTS. ENGINE/APU FIRE DETECTION CONTROL MODULE BITE TESTED GOOD. VERIFIED NR 2 ENG FIRE DETECTION B-LOOP SYS OPS TESTED GOOD ON GROUND.