As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2966, FLIGHT CREW REPORTED PACK NR 2 OVERTEMP AND BLEED 1 AND 2 OVERTEMP INDICATIONS ON EICAS. CREW PERFORMED AIR RETURN AND LANDED ACFT UNEVENTFULLY. MX REMOVED AND REPLACED PRECOOLER AND PERFORMED OPS CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.