As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. EMERGENCY DECLARED. CLT-TPA FLIGHT DIVERTED TO JAX. DURING CRUISE AT FL300 WITH NR 1 PACK PLACARDED INOPERATIVE, RECEIVED A NR 2 PACK FAILURE WARNING. PERFORMED EMERGENCY DESCENT TO FL100. UNEVENTFUL LANDING. REMOVED AND REPLACED PACK CONTROLLER PER AMM 21-61-34-400. OPERATIONAL CHECK GOOD.