As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CARGO FIRE DETECTOR, AFT B LOOP DOES NOT TEST. ACFT GROUNDED. DUPLICATED DEFECT. FOUND AFT CARGO B2 M2246 DET FAULTING. CLEANED AFT B2 DETECTOR IAW MM 26-16-01. CARGO SMOKE DETECTOR OPS CHECKED ALL NORMAL IAW MM 26-16-00. NO HISTORY 30 DAYS.