What was found
PACK LIGHT STAYS ON WHEN RECALL CHECKED. ACFT GROUNDED. TROUBLESHOT IAW FIM 21-53, TASK 811. PACK OPERATED, VERIFIED AIR FLOW GOOD. PACK LIGHT STILL ILLUMINATES ON RECALL. PERFORMED FIM 21-62, TASK 801. BITE FAILED FOR PACK TCV, ON ZONE TEMP CONT 1. IAW FIM 21-62, TASK 830, CLEARED FAULT. PERFORMED PACK TEMP CONTROL BITE AGAIN IAW FIM 21-62, TASK 801, AND AGAIN A PACK TCV FAILS ERROR. REMOVED AND REPLACED THE LEFT TEMP PACK CONTROL VALVE IAW AMM 21-51-10. PERFORMED PACK/ZONE TEMP CONTROLLER BITE TEST IAW AMM 21-61-00-700-806-002. CHECK WAS GOOD. LEAK TESTED GOOD.