As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2306 EWR DURING CLIMBING FLIGHT CREW REPORTED THE FOLLOWING MSGS ON EICAS: PACK 2 CLSD AND BLD 2 CLSD. CREW RESET THE SYSTEM BUT FAILED AGAIN AND WHEN TRIED AN ANTI ICE TEST GOT BLD 2 FAIL MSG. CREW PERFORMED AIR RETURN AND LANDED UNEVENTFULLY. EWR MX R&R NR 2 BLEED VALVE AND PERFORMED OPS CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.