As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB CREW RECEIVED PACK 1 OVLD MSG FOLLOWED BY PACK 1 OVLD MSG. CREW COMPLIED WITH AOM VOL 1 PROCEDURES, DECLARED AN EMER & RETURNED WITHOUT INCIDENT. FOUND BROKEN CLAMP AT PACK 1 VALVE. R & R CLAMP IAW AMM 21-51-01. LEAK & OPS CHECKED GOOD.