As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3509 THE CREW REPORTED THAT ON THE CLIMB THROUGH AT 10000 FEET THEY RECEIVED "CABIN" AURAL WARNING AND RED CABIN ALTITUDE INDICATION ON EICAS. RECEIVED NORMAL INDICATIONS WHILE DESCENDING. THE CREW DECLARED AN EMERGENCY AND LANDED WTHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. OPERATIONALLY CHECKED PRESSURIZATION CONTROL SYSTEM IN MANUAL AND AUTOMATIC MODE IAW EMB 145 AMM 21-31-00. UNABLE TO DUPLICATE CONDITIONS AIRCRAFT OK TO RETURN TO SERVICE. THE AIRCRAFT WAS RETURNED TO SERVICE.