As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ISSUE: PACK 1 OVERHEAT AND PACK 2 FAIL MESSAGES ON CLIMB OUT CREW DECLARED AN EMERGENCY AND RETURNED. PACK 1 OVERHEAT RAN FIM CLEANED AND CHECKED CONTINUITY AT P0944 & P0454 NO DEFECTS. PACK 2 FAIL CLEANED AND RESEATED PACK VALVE CONNECTOR COULDN'T DUPLICATE PACK 2 FAIL OPS TESTED GOOD.