As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO SMOKE DETECTOR INOPERATIVE. REPLACED AFT CARGO SMOKE DETECTOR M26061, NOW MESSAGE 26-21064 "TUBE1 AIRFLOW LOW". ON ACCOUNT AFT CARGO DETECTOR REPLACED BY ORD ON 21MAY AND NO FURTHER STATUS MSG FOR THE AFT CARGO SMOKE. THE AFT PIT IS NO LONGER INOP AND CAN BE USED.