As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 5806 L RECIR FAN EICAS APPEARED, FOLLOWED BY CALL FROM F/A'S THAT THERE WAS A SMOKE SMELL IN THE CABIN . CONTACTED MCC AND SECURED L RECIRC FAN SWITCH. CORRECTIVE ACTION: R/R LT RECIR FAN FILTER PER B757 AMM 21-25. REMOVED LT RECIRC FAN PER B757 AMM 21-25. INSTALLED LT RECIRC FAN PER B757 AMM 21-25 AND OP'S CK NML. NO FURTHER FAULTS ,MSG'S OR SMOKE NOTED.