As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MASTER WARNING CAME ON WITH NO OTHER ANNUNCIATIONS. SMOKE DETECTOR PANEL CIRCUIT BREAKER POPPED. INSPECTED OVERHEAD PANEL WIRING AND CARGO FIRE SUPPRESSION CONTROL PANEL. NO VISIBLE DEFECTS NOTED, ALSO INSPECTED CARGO PIT SMOKE DETECTOR. NO VISIBLE DEFECTS NOTED. REMOVED AND REPLACED CONTROL PANEL.