What was found
SMOKE COMING FROM FLOOD VENT REAR CABIN. ACCESSED CABIN TEMP CONTROL VALVE, ACCOMPLISHED FUNCTIONAL TEST OF VALVE, NO DEFECTS NOTED. REMOVED VALVE & INSPECTED BUTTERFLY, NO DEFECTS NOTED. REINSTALLED VALVE. FUNCTIONAL TEST TEMP CONTROL SYS IN BOTH AUTO & MANUAL, NO DEFECTS NOTED. NO SMOKE DETECTED. ACCESSED WATER SEPARATER. REMOVED & INSPECTED SOCK. NO DEFECTS NOTED. REINSTALLED CONDENSOR SOCK & WATER SEPARATOR. TEMP CONTROL VALVE REPLACED AS A PRECAUTION. REMOVED VALVE & INSTALLED O/H VALVE ACCOMPLISHED OPS CHECKS LEAK CHECKS. NO DEFECTS NOTED. IAW MM 21-60-00, 21-10-95, 21-60-67.