As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED, AN EMERGENCY WAS DECLARED DUE TO: CABIN AIR TEMPERATURE WAS UNCONTROLLABLY HOT. AIRCRAFT DIVERTED TO AND LANDED SAFELY AT PHL. REMOVED AND REPLACED TRIM AIR (PRSOV)-PRESSURE REGULATING AND SHUTOFF VALVE (AALA202601129398). ALSO REMOVED AND REPLACED RIGHT HAND IASC (AALA202601120471), PER AMM 21-62-01 AND 21-61-22. OPS CHECKED GOOD CABIN TEMPERATURE IS CONTROLLABLE NOW.