As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE, CARGO FIRE CONTROL PANEL AMBER LIGHT ON 7A. THIS TRIGGERED THE FIRE BELLS, MASTER WARNING, AND FIRE ANNUNCIATOR LIGHT. CREW DIVERTED (DIV) TO PHX. MTC REMOVED AND REPLACED SMOKE DETECTOR 7A IAW IAI AMM SUPPLEMENT 26-14-01 OPS CHECKS GOOD, A/C REMAINS NO ETOPS. A/C RETURNED TO SERVICE.