As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CHEMICAL/RUBBERY SMELL NOTED IN COCKPIT. SMELL SEEMED TO DISAPATE WITH PACK 1 TURNED OFF. R & R COCKPIT RECIRCULATION FAN DUE TO LOUD HIGH PITCH WHINE. COMPLIED WITH ETN-EM-72-034 ENG ODOR EVENT TROUBLESHOOTING SUPPLEMENT NO ODORS DETECTED IN COCKPIT OR CABIN. NO DEFECTS NOTED.