As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FIRE DETECTION TEST, ENG #2 FIRE HANDLE DOES NOT ILLUMINATE. ENG# 2 HANDLE ILLUMINATES DURING TEST OF "A" LOOP. GROUNDED - YES. VERIFIED FOUND TERMINAL LUG PULLED OFF WIRE AT CORE DETECTOR. REF. B737-800 AMM 26-11-02, RE TERMINATED A NEW LUG ONTO WIRE. OPS NML REF AMM 26-11-00.