As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - RT ENGINE FIRE BELL, CAPTION LIGHT AND FIRE LIGHT ACTIVATED WHEN ELECTRICAL BUS IS POWERED. MAINTENACNE CLEANED MOISTURE FROM FIRE CONTROL UNIT CONNECTORS AND ZONE II FIRE WIRE ASSEMBLY. RIGHT ENGINE FIRE WARNING SYSTEM OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE. (Z)