As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ENG FIRE TEST LIGHTS IN FIRE SWITCH HANDLE NR 2 FAILED TO ILLUMINATE. PERFORMED ENG/APU FIRE DET CONT MODULE BITE TEST PER FIM 26 10 TASK 801. FAULTED NR 2 ENG LOOP B UPPER FAN DETECTOR. FOUND WIRE AT UPPER FAN DET BROKEN OFF TERMINAL. RE-TERMINATED PER SWPD 20 30 11 WDM 26 11 21 AND 26 11 11. ENG FIRE DETECTOR OPS TEST NML PER AMM 26 11 00 710 801.