As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN TEMPERATURE CONTROL DID NOT WORK ON THE GROUND. WORKED NORMALLY IN-FLIGHT. FOUND TEMPERATURE MODULATING AND SHUT-OFF VALVE CRACKED AT INLET FITTING. LEAKING. THIS VALVE WAS INSTALLED AT THE FACTORY. SUBMITTED SUSPECTED TORQUE NOT USED OR RECOMMENDED TORQUE TOO HIGH FOR PART STRENGTH.