As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - SMOKE - LOG 7245883 - CREW HEARD A LOUD NOISE FROM THE LEFT PACK FOLLOWED BY A DUCT OVERHEAT LIGHT. THEY NOTICED SMOKE COMING OUT OF THE RAM AIR DOOR AND A BURNT TOAST SMELL IN THE CABIN. MX DISCOVERED THE COND RELAY BOX IN ELECTRONIC EQUIPMENT COMPARTMENT LOOSE. MAINTENANCE SECURED THE BOX OPS CHECK GOOD. THE ODOR DISAPATED AND DID NOT RETURN.