As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THAT ON WHILE ON APPROACH, NR 2 PACK TRIPPED & HAD TO BE RESET. AFTER LANDING & DURING TAXI TO GATE, A STRONG METAL BURNING ODOR AND SMOKE FROM NR 2 PACK. MAINTENANCE TROUBLESHOT THE NR 2 PACK. MAINTENANCE PERFORMED AN OPERATIONAL CHECK OF THE NR 1 & 2 PACK SYSTEMS IAW 21-51-00 AND COULD NOT DUPLICATE THE BURNING ODOR.