As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT NOTICED AIRCRAFT NOT PRESSURIZING. THAT WAS FOLLOWED BY BLD 1 VLV CLSD & PACK 1 VLV CLSD MSG ADVISORY. RESET THEM BUT MESSAGES KEPT COMIMG BACK WITH RUSH OF AIR EACH TIME-C/A-REMOVED AND REPLACED COUPLING AND CLAMP ON DUAL TEMP VALVE DUCT IAW ETN-EM-21-056 OPS CHECK GOOD