As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOUD (RUSHING AIR) SOUND FROM AFT CABIN AREA. ALSO RIGHT TEMP CONTROL VALVE WHEN FULL HOT, BUT CABIN TEMP SHOWS FULL COLD. TEMP MODULATION (MANUAL MODE) HAS NO EFFECT. FOUND RIGHT TEMP CONTROL VALVE OUTLET DUCT CRACKED AND COUPLING HOSE DETERIORATED. INSTALLED NEW WELDED DUCT ASSEMBLY AND HOSE COUPLING. OPERATIONAL AND LEAK CHECK GOOD.