As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 6466 LGA TO ORD ON CLIMBOUT CREW REPORTED MESSAGES EICAS: BLD 2 FAIL; SHORTLY AFTER PACK 1 FAIL, THEN BLEED 2 FAIL, THEN PACK 2 FAIL. CABIN ALTITUDE WAS RISING AND CREW GOT CABIN ALTITUDE HI. EMERGENCY DECLARED AND EMERGENCY DESCENT ACCOMPLISHED. DIVERTED TO CMH, LANDED WITHOUT INCIDENT. REMOVED AND REPLACED FAN AIR VALVE E1 AND E2.