As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 ENGINE FIRE HANDLE WILL NOT ILLUMINATE DURING FIRE TEST. GROUNDED - YES. PERFORMED BITE REF B737-800 FIM 26-10 TASK 801. FAULTED FOR LOOP B ON #2 ENG FOR "LOW RESISTANCE CLEAN CONNECTORS" FOLLOWED FIM 26-10 TASK 810. RE-RACKED FIRE DETECTION CONTROL MODULE AND CLEANED LOOP B DETECTORS AND METERED RESISTANCE. PERFORMED BITE REF FIM 26-10 TASK 801. OPS CHECKS GOOD.