As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DET FAN 2 CARGO AFT AFT CARGO COMPARTMENT SMOKE DETECTOR FAN NR 2 FAILURE. STATUS MSG01- LATCHED CRUISE MODE DEPENDENT; CARGO SMOKE DETECTOR FAN 2 (LWR AFT) CIRCUIT IS OPEN OR SHORTED. DB- CARGO SMOKE DETECTOR CH 2 (LWR AFT) MSG02- LATCHED CRUISE MODE DEPENDENT. REPLACED AFT CARGO PIT NR 2 SMOKE DETECTOR FAN PER MM. TESTS OK.