As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ODOR IN THE COCKPIT SMELLED LIKE HOT INSULATION, AT THE SAME TIME THE LEFT RECIRC FAN INOP LIGHT CAME ON WITH EICAS MSG. TURNED OFF LEFT RECIRC FAN AND SMELL WENT AWAY. T/S AS PER AMM FOUND LEFT RECIRC INOP AND RED RUBBER SEAL BETWEEN FILTER AND FAN DAMAGED. PARTS NIS MUC FWD TO MCO AS PER MEL 21-25-01A. PLACARD INSTALLED. C/B R14 PULLED AND SECURED.