As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REF CI 26-08 EICAS MAINT MSG "AFT DET FAN" ON MAINT PAGE. REPLACED AFT NR 1 DETECTOR P/N 2166-604A, S/N 23154B, NO HELP ACCOMPLISHED FIM 26-16-00 FIG 105, BLOWER NR 1 M718 AND RELAY K332 P/N BACR13CE2, NO S/N FOR AFT CARGO. EICAS MSG CLEARED IAW 26-16-02.