As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG BURNING ODOR THROUGHOUT ACFT. TROUBLESHOT AND FOUND LT RECIRCULATION FAN NOISY. SUSPECT BRG FAILURE. PULLED AND COLLERED C-B FOR LT FAN. C-B POWERS LT RECIRC FAN ONLY. NO PART AT ORD. FAN ON AOG C2023. REMOVED AND REPLACED LT RECIRC FAN. OPS CHECKS NORMAL. OK FOR SERVICE.