As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH SMOKE PRESENT IN COCKPIT. SHORTLY AFTER THE LEFT RECIRC FAN EICAS MSG APPEARED. TURNED LEFT RECIRC FAN OFF. SMOKE DID DISSIPATE AFTER LDG. CONTRACT MTC FOUND THE LEFT RECIRC FAN C/B IN, BUT POPPED WHEN BARELY TOUCHED. ALSO C/B WAS VERY HOT TO THE TOUCH. REPLACED RECIRC FAN