As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MORNING CHECKLIST THE AFT BAGGAGE COMP INLET VENT VALVE WOULD NOT CLOSE DURING AFT BAGGAGE COMP FIRE TEST. R & R AFT BAGGAGE COMP. INLET VENT VALVE IAW AMM TASK 21-22-74-000-801/TASK 21-22-74-400-801. OPS CHECKED GOOD. NO OTHER DEFECTS NOTED. RETURNED TO SERVICE.