As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PACK 2 FAIL MESSAGE AFTER TAKEOFF WITH TEMPORARY SMOKE LIKE SMELL. PACK 2 RETURNED AFTER CHECKLIST, NO VISIBLE SMOKE IN CABIN. PACK 2 FAIL AGAIN AT 13000, TURNED PACK 2 OFF. MAINTENANCE DEFERRED THE PACK 2 SYSTEM. THE DEFERRAL WAS CLEARED BY REPLACING THE AIR CYCLE MACHINE AND DUAL HEAT EXCHANGER.