What was found
DTW - FLT 9815 - AFTER TAKEOFF LAS ABOUT 30 SECONDS A/C GOT VERY HOT IN THE CABIN SOME HAZE, TURN RIGHT PACK OFF A/C COOLED OFF NO HAZE, RIGHT PACK NEEDLE FLUCTUATED FROM 10-2 O'CLOCK POS BEFORE TURNING OFF SUPPLY TEMP ONLY INDICATED 140. TESTED CABIN TEMP CONTROL SYSTEM WITH LINE CHECKER, FOUND SYSTEM SHUTDOWN THERMAL SWITCH AND CABIN RATE OF CHANGE/HIGH LIMIT SENSOR (P/N 60730011 S/N 088C4219) BAD, REMOVED AND REPLACED BOTH UNITS. OPS CHECK GOOD. RAN ENGINES AT TAKEOFF POWER, VERIFIED SYSTEM OPERATES PROPERLY AT HIGH POWER. (M)