As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO FIRE TEST FAILS LIGHTS FOR FWD A AND AFT A AND B LOOPS WERE ON. INSTALLED SERVICEABLE CARGO FIRE DETECTOR & SUP CONTROL PNL & INSTALLED 2 SERVICEABLE DETECTORS IN AFT PIT. SYS NOW ONLY FAILS FWD A DET NEED ONE DET FOR FWD. REPLACED CARGO FIRE SYSTEM SMOKE DETECTOR.