As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PACK ONE OVERLOAD MESSAGE FOLLOWED BY PACK TWO OVERLOAD MESSAGE, EMERGENCY DECLARED. RETURNED TO ACT. PERFORMED FUNCTIONAL CHECK OF NUMBER ONE PACK WITH NO DEFECTS NOTED. REMOVED AND REPLACED NUMBER TWO PACK OVERPRESSURE SWITCH IAW EMB 21-51-06. OPERATIONAL CHECK GOOD. RETURNED AIRCRAFT TO SERVICE.