As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LH RECIRC FAN CB TRIPPED ACCOMPANIED BY PLASTIC SMELL ( RECIRCULATION FANS ). REMOVED FROM SERVICE. UPON INSPECTION, FOUND CORROSION INHIBITING COMPOUND ON LH RECIRC FAN. REMOVED AND REPLACED LH RECIRC FAN IAW E175 AMM 21-24-01-000/400-801-A. PERFORMED OPS TEST. OPS TEST GOOD. SMELL DOESN'T PERSIST ANYMORE. RETURNED TO SERVICE.