As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DET ZONE 1 CARGO AFT AFT CARGO COMPARTMENT SMOKE DETECTOR ZONE FAILURE. STATUS MSG01- ACTIVE CRUISE HARD; CARGO SMOKE DETECTOR TUBE 1 (LWR AFT) AIRFLOW IS LOW. DB- CARGO SMOKE DETECTOR CH 2 (LWR AFT) ITEM CNX PER PLF SHOWS NOT ACTIVE MSG-2621062 ACTIVE ER HARD. BLOW N2 TO TUBE 1 FROM DETECTOR SIDE. AFTER RECONNECTING THE TUBE. THE MSG IS DISAPPEARED. PERFORM GRD TEST, PASSED.