As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PACK NR 1 PRODUCES BURNING SMELL WHEN ON. MAINTENANCE PERFORMED EMB-145 FIM TASK 21-20-00-810-801-A. MAINTENANCE ALSO CLEANED NR 1 PACK RAM AIR DUCT. MAINTENANCE REMOVED NR 1 PACK RAM AIR DUCT AND RE-INSTALLED NR 1 PACK RAM AIR DUCT IAW EMB-145 AMM 21-20-04. OPERATIONAL CHECK GOOD. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.