As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH FL 220 A VIBRATION WAS FELT ACCOMPANIED BY A BURNING ODOR. SECURED NR 3 PACK AND VIBRATION AND ODOR WENT AWAY. ON NR 3 PACK REPLACED COALESCER BAG AND RETAINING RING MM 21-51-05 LP 935157/1. REPLACED COMP DISCH TEMP BULB MM 21-51-02 LP 935158/1. ACCOMPLISHED AIR CYCLE PACK SYSTEM TEST PER MM 21-51-00. COULD NOT DUPLICATE VIBE/SMELL. RAN PACK 55 MINUTES.