What was found
OVERHEAD AIR TEMP, SUPPLY DUCT, PACK INDICATOR GAUGE READS ZERO IN ALL POSITIONS. COMPLETE CONTROL OF PASSENGER CABIN TEMP, SUPPLY DUCT, AND PACK TEMP. NO OTHER ABNORMAL INDICATIONS. PERFORMED OPS CHECK IAW AMM 21-61-32-400-801. OPS CHECKED NORMAL, NO HISTORY LAST 60 DAYS.