As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3636 THE CREW REPORTED THAT THE NUMBER 2 PACK WAS INOPERABLE AT FLIGHT LEVEL 23000 AND WOULD NOT RESET. THE CAPTAIN DECLARED AN EMERGENCY AND ELECTED TO DIVERT CAE. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. RE-ACTIVATED OUTFLOW VALVES IAW EMB AMM 21-31-04. THE OPERATIONAL CHECK WAS GOOD IAW EMB AMM TASK 21-31-00-700-804-A. THE AIRCRAFT WAS RETURNED TO SERVICE.