As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN ALT WARNING AT APPROX 14,000' NO OTHER INDICATIONS AC DOES NOT PRESSURIZE AC RETURNED TO FIELD (ATB) AND LANDED SAFELY PEREFORMED CABIN PRESSURE LEAK TEST, A/C PRESSURIZED TO 4.0 PSI DIFF WITH NO ISSUES AND LEAK RATE WAS WITHIN LIMITS ALL IAW B767 AMM 05-51-24. PERFORMED OP'S CHECK OF OUTFLOW VALVE IAW B767 AMM 21-51-03, OP'S CHECK GOOD RAN BOTH ENGINES AND VERIFIED BOTH ENGINES ARE PRODUCING AIR IAW B767 AMM 71-00-00. A/C REMAINS ETOPS 180. AND RETURNED AC TO SERVICE